path: root/doc/rfc/rfc2000.txt

Network Working Group                        Internet Architecture Board
Request for Comments: 2000                             J. Postel, Editor
Obsoletes: 1920, 1880, 1800, 1780, 1720,                   February 1997
1610, 1600, 1540, 1500, 1410, 1360,
1280, 1250, 1200, 1140, 1130, 1100, 1083
STD: 1
Category: Standards Track


                  INTERNET OFFICIAL PROTOCOL STANDARDS


Status of this Memo

   This memo describes the state of standardization of protocols used in
   the Internet as determined by the Internet Architecture Board (IAB).
   This memo is an Internet Standard.  Distribution of this memo is
   unlimited.

Table of Contents

   Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 2
   1.  The Standardization Process  . . . . . . . . . . . . . . . . 3
   2.  The Request for Comments Documents . . . . . . . . . . . . . 5
   3.  Other Reference Documents  . . . . . . . . . . . . . . . . . 6
   3.1.  Assigned Numbers . . . . . . . . . . . . . . . . . . . . . 6
   3.2.  Gateway Requirements . . . . . . . . . . . . . . . . . . . 6
   3.3.  Host Requirements  . . . . . . . . . . . . . . . . . . . . 6
   3.4.  The MIL-STD Documents  . . . . . . . . . . . . . . . . . . 6
   4.  Explanation of Terms . . . . . . . . . . . . . . . . . . . . 7
   4.1.  Definitions of Protocol State (Maturity Level) . . . . . . 8
   4.1.1.  Standard Protocol  . . . . . . . . . . . . . . . . . . . 8
   4.1.2.  Draft Standard Protocol  . . . . . . . . . . . . . . . . 8
   4.1.3.  Proposed Standard Protocol . . . . . . . . . . . . . . . 8
   4.1.4.  Experimental Protocol  . . . . . . . . . . . . . . . . . 8
   4.1.5.  Informational Protocol . . . . . . . . . . . . . . . .   9
   4.1.6.  Historic Protocol  . . . . . . . . . . . . . . . . . .   9
   4.2.  Definitions of Protocol Status (Requirement Level) . . .   9
   4.2.1.  Required Protocol  . . . . . . . . . . . . . . . . . .   9
   4.2.2.  Recommended Protocol . . . . . . . . . . . . . . . . .   9
   4.2.3.  Elective Protocol  . . . . . . . . . . . . . . . . . .   9
   4.2.4.  Limited Use Protocol . . . . . . . . . . . . . . . . .   9
   4.2.5.  Not Recommended Protocol . . . . . . . . . . . . . . .   9
   5.  The Standards Track  . . . . . . . . . . . . . . . . . . .  10
   5.1.  The RFC Processing Decision Table  . . . . . . . . . . .  10
   5.2.  The Standards Track Diagram  . . . . . . . . . . . . . .  11
   6.  The Protocols  . . . . . . . . . . . . . . . . . . . . . .  13
   6.1.  Recent Changes . . . . . . . . . . . . . . . . . . . . .  13



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   6.1.1.  New RFCs . . . . . . . . . . . . . . . . . . . . . . .  13
   6.1.2.  Other Changes  . . . . . . . . . . . . . . . . . . . .  32
   6.2.  Standard Protocols . . . . . . . . . . . . . . . . . . .  34
   6.3.  Network-Specific Standard Protocols  . . . . . . . . . .  36
   6.4.  Draft Standard Protocols . . . . . . . . . . . . . . . .  37
   6.5.  Proposed Standard Protocols  . . . . . . . . . . . . . .  38
   6.6.  Telnet Options . . . . . . . . . . . . . . . . . . . . .  44
   6.7.  Experimental Protocols . . . . . . . . . . . . . . . . .  45
   6.8.  Informational Protocols  . . . . . . . . . . . . . . . .  48
   6.9.  Historic Protocols . . . . . . . . . . . . . . . . . . .  49
   6.10  Obsolete Protocols . . . . . . . . . . . . . . . . . . .  51
   7.  Contacts . . . . . . . . . . . . . . . . . . . . . . . . .  52
   7.1.  IAB, IETF, and IRTF Contacts . . . . . . . . . . . . . .  52
   7.1.1.  Internet Architecture Board (IAB) Contact  . . . . . .  52
   7.1.2.  Internet Engineering Task Force (IETF) Contact . . . .  53
   7.1.3.  Internet Research Task Force (IRTF) Contact  . . . . .  54
   7.2.  Internet Assigned Numbers Authority (IANA) Contact . . .  54
   7.3.  Request for Comments Editor Contact  . . . . . . . . . .  55
   7.4.  Network Information Center Contact . . . . . . . . . . .  55
   7.5.  Sources for Requests for Comments  . . . . . . . . . . .  56
   8.  Security Considerations  . . . . . . . . . . . . . . . . .  56
   9.  Author's Address . . . . . . . . . . . . . . . . . . . . .  56

Introduction

   A discussion of the standardization process and the RFC document
   series is presented first, followed by an explanation of the terms.
   Sections 6.2 - 6.10 contain the lists of protocols in each stage of
   standardization.  Finally are pointers to references and contacts for
   further information.

   This memo is intended to be issued approximately quarterly; please be
   sure the copy you are reading is current.  Current copies may be
   obtained from the Network Information Center (INTERNIC) or from the
   Internet Assigned Numbers Authority (IANA) (see the contact
   information at the end of this memo).  Do not use this edition after
   16-Jun-97.

   See Section 6.1 for a description of recent changes.  In the official
   lists in sections 6.2 - 6.10, an asterisk (*) next to a protocol
   denotes that it is new to this document or has been moved from one
   protocol level to another, or differs from the previous edition of
   this document.








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1.  The Standardization Process

   The Internet Architecture Board maintains this list of documents that
   define standards for the Internet protocol suite.  See RFC-1601 for
   the charter of the IAB and RFC-1160 for an explanation of the role
   and organization of the IAB and its subsidiary groups, the Internet
   Engineering Task Force (IETF) and the Internet Research Task Force
   (IRTF).  Each of these groups has a steering group called the IESG
   and IRSG, respectively.  The IETF develops these standards with the
   goal of co-ordinating the evolution of the Internet protocols; this
   co-ordination has become quite important as the Internet protocols
   are increasingly in general commercial use.  The definitive
   description of the Internet standards process is found in RFC-1602.

   The majority of Internet protocol development and standardization
   activity takes place in the working groups of the IETF.

   Protocols which are to become standards in the Internet go through a
   series of states or maturity levels (proposed standard, draft
   standard, and standard) involving increasing amounts of scrutiny and
   testing.  When a protocol completes this process it is assigned a STD
   number (see RFC-1311).  At each step, the Internet Engineering
   Steering Group (IESG) of the IETF must make a recommendation for
   advancement of the protocol.

   To allow time for the Internet community to consider and react to
   standardization proposals, a minimum delay of 6 months before a
   proposed standard can be advanced to a draft standard and 4 months
   before a draft standard can be promoted to standard.

   It is general practice that no proposed standard can be promoted to
   draft standard without at least two independent implementations (and
   the recommendation of the IESG).  Promotion from draft standard to
   standard generally requires operational experience and demonstrated
   interoperability of two or more implementations (and the
   recommendation of the IESG).

   In cases where there is uncertainty as to the proper decision
   concerning a protocol a special review committee may be appointed
   consisting of experts from the IETF, IRTF and the IAB with the
   purpose of recommending an explicit action.

   Advancement of a protocol to proposed standard is an important step
   since it marks a protocol as a candidate for eventual standardization
   (it puts the protocol "on the standards track").  Advancement to
   draft standard is a major step which warns the community that, unless
   major objections are raised or flaws are discovered, the protocol is
   likely to be advanced to standard in six months.



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   Some protocols have been superseded by better ones or are otherwise
   unused.  Such protocols are still documented in this memorandum with
   the designation "historic".

   Because it is useful to document the results of early protocol
   research and development work, some of the RFCs document protocols
   which are still in an experimental condition.  The protocols are
   designated "experimental" in this memorandum.  They appear in this
   report as a convenience to the community and not as evidence of their
   standardization.

   Other protocols, such as those developed by other standards
   organizations, or by particular vendors, may be of interest or may be
   recommended for use in the Internet.  The specifications of such
   protocols may be published as RFCs for the convenience of the
   Internet community.  These protocols are labeled "informational" in
   this memorandum.

   In addition to the working groups of the IETF, protocol development
   and experimentation may take place as a result of the work of the
   research groups of the Internet Research Task Force, or the work of
   other individuals interested in Internet protocol development.  The
   the documentation of such experimental work in the RFC series is
   encouraged, but none of this work is considered to be on the track
   for standardization until the IESG has made a recommendation to
   advance the protocol to the proposed standard state.

   A few protocols have achieved widespread implementation without the
   approval of the IESG.  For example, some vendor protocols have become
   very important to the Internet community even though they have not
   been recommended by the IESG.  However, the IAB strongly recommends
   that the standards process be used in the evolution of the protocol
   suite to maximize interoperability (and to prevent incompatible
   protocol requirements from arising).  The use of the terms
   "standard", "draft standard", and "proposed standard" are reserved in
   any RFC or other publication of Internet protocols to only those
   protocols which the IESG has approved.

   In addition to a state (like "Proposed Standard"), a protocol is also
   assigned a status, or requirement level, in this document.  The
   possible requirement levels ("Required", "Recommended", "Elective",
   "Limited Use", and "Not Recommended") are defined in Section 4.2.
   When a protocol is on the standards track, that is in the proposed
   standard, draft standard, or standard state (see Section 5), the
   status shown in Section 6 is the current status.

   Few protocols are required to be implemented in all systems; this is
   because there is such a variety of possible systems, for example,



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   gateways, routers, terminal servers, workstations, and multi-user
   hosts.  The requirement level shown in this document is only a one
   word label, which may not be sufficient to characterize the
   implementation requirements for a protocol in all situations.  For
   some protocols, this document contains an additional status paragraph
   (an applicability statement).  In addition, more detailed status
   information may be contained in separate requirements documents (see
   Section 3).

2.  The Request for Comments Documents

   The documents called Request for Comments (or RFCs) are the working
   notes of the "Network Working Group", that is the Internet research
   and development community.  A document in this series may be on
   essentially any topic related to computer communication, and may be
   anything from a meeting report to the specification of a standard.

   Notice:

      All standards are published as RFCs, but not all RFCs specify
      standards.

   Anyone can submit a document for publication as an RFC.  Submissions
   must be made via electronic mail to the RFC Editor (see the contact
   information at the end of this memo, and see RFC 1543).

   While RFCs are not refereed publications, they do receive technical
   review from the task forces, individual technical experts, or the RFC
   Editor, as appropriate.

   The RFC series comprises a wide range of documents, ranging from
   informational documents of general interests to specifications of
   standard Internet protocols.  In cases where submission is intended
   to document a proposed standard, draft standard, or standard
   protocol, the RFC Editor will publish the document only with the
   approval of the IESG.  For documents describing experimental work,
   the RFC Editor will notify the IESG before publication, allowing for
   the possibility of review by the relevant IETF working group or IRTF
   research group and provide those comments to the author.  See Section
   5.1 for more detail.

   Once a document is assigned an RFC number and published, that RFC is
   never revised or re-issued with the same number.  There is never a
   question of having the most recent version of a particular RFC.
   However, a protocol (such as File Transfer Protocol (FTP)) may be
   improved and re-documented many times in several different RFCs.  It
   is important to verify that you have the most recent RFC on a
   particular protocol.  This "Internet Official Protocol Standards"



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   memo is the reference for determining the correct RFC for the current
   specification of each protocol.

   The RFCs are available from the INTERNIC, and a number of other
   sites.  For more information about obtaining RFCs, see Sections 7.4
   and 7.5.

3.  Other Reference Documents

   There are three other reference documents of interest in checking the
   current status of protocol specifications and standardization.  These
   are the Assigned Numbers, the Gateway Requirements, and the Host
   Requirements.  Note that these documents are revised and updated at
   different times; in case of differences between these documents, the
   most recent must prevail.

   Also, one should be aware of the MIL-STD publications on IP, TCP,
   Telnet, FTP, and SMTP.  These are described in Section 3.4.

3.1.  Assigned Numbers

   The "Assigned Numbers" document lists the assigned values of the
   parameters used in the various protocols.  For example, IP protocol
   codes, TCP port numbers, Telnet Option Codes, ARP hardware types, and
   Terminal Type names.  Assigned Numbers was most recently issued as
   RFC-1700.

3.2.  Requirements for IP Version 4 Routers

   This document reviews the specifications that apply to gateways and
   supplies guidance and clarification for any ambiguities.
   Requirements for IP Version 4 Routers is RFC-1812.

3.3.  Host Requirements

   This pair of documents reviews and updates the specifications that
   apply to hosts, and it supplies guidance and clarification for any
   ambiguities.  Host Requirements was issued as RFC-1122 and RFC-1123.

3.4.  The MIL-STD Documents

   The DoD MIL-STD Internet specifications are out of date and have been
   discontinued.  The DoD's Joint Technical Architecture (JTA) lists the
   current set of IETF STDs and RFCs that the DoD intends to use in all
   new and upgraded Command, Control, Communications, Computers, and
   Intelligence (C4I) acquisitions.  A copy of the JTA can be obtained
   from http://www-jta.itsi.disa.mil.




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4.  Explanation of Terms

   There are two independent categorization of protocols.  The first is
   the "maturity level" or STATE of standardization, one of "standard",
   "draft standard", "proposed standard", "experimental",
   "informational" or "historic".  The second is the "requirement level"
   or STATUS of this protocol, one of "required", "recommended",
   "elective", "limited use", or "not recommended".

   The status or requirement level is difficult to portray in a one word
   label.  These status labels should be considered only as an
   indication, and a further description, or applicability statement,
   should be consulted.

   When a protocol is advanced to proposed standard or draft standard,
   it is labeled with a current status.

   At any given time a protocol occupies a cell of the following matrix.
   Protocols are likely to be in cells in about the following
   proportions (indicated by the relative number of Xs).  A new protocol
   is most likely to start in the (proposed standard, elective) cell, or
   the (experimental, limited use) cell.

                             S T A T U S
                     Req   Rec   Ele   Lim   Not
                   +-----+-----+-----+-----+-----+
           Std     |  X  | XXX | XXX |     |     |
       S           +-----+-----+-----+-----+-----+
           Draft   |  X  |  X  | XXX |     |     |
       T           +-----+-----+-----+-----+-----+
           Prop    |     |  X  | XXX |     |     |
       A           +-----+-----+-----+-----+-----+
           Info    |     |     |     |     |     |
       T           +-----+-----+-----+-----+-----+
           Expr    |     |     |     | XXX |     |
       E           +-----+-----+-----+-----+-----+
           Hist    |     |     |     |     | XXX |
                   +-----+-----+-----+-----+-----+

   What is a "system"?

      Some protocols are particular to hosts and some to gateways; a few
      protocols are used in both.  The definitions of the terms below
      will refer to a "system" which is either a host or a gateway (or
      both).  It should be clear from the context of the particular
      protocol which types of systems are intended.





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4.1.  Definitions of Protocol State

   Every protocol listed in this document is assigned to a "maturity
   level" or STATE of standardization: "standard", "draft standard",
   "proposed standard", "experimental", or "historic".

   4.1.1.  Standard Protocol

      The IESG has established this as an official standard protocol for
      the Internet.  These protocols are assigned STD numbers (see RFC-
      1311).  These are separated into two groups: (1) IP protocol and
      above, protocols that apply to the whole Internet; and (2)
      network-specific protocols, generally specifications of how to do
      IP on particular types of networks.

   4.1.2.  Draft Standard Protocol

      The IESG is actively considering this protocol as a possible
      Standard Protocol.  Substantial and widespread testing and comment
      are desired.  Comments and test results should be submitted to the
      IESG.  There is a possibility that changes will be made in a Draft
      Standard Protocol before it becomes a Standard Protocol.

   4.1.3.  Proposed Standard Protocol

      These are protocol proposals that may be considered by the IESG
      for standardization in the future.  Implementation and testing by
      several groups is desirable.  Revision of the protocol
      specification is likely.

   4.1.4.  Experimental Protocol

      A system should not implement an experimental protocol unless it
      is participating in the experiment and has coordinated its use of
      the protocol with the developer of the protocol.

      Typically, experimental protocols are those that are developed as
      part of an ongoing research project not related to an operational
      service offering.  While they may be proposed as a service
      protocol at a later stage, and thus become proposed standard,
      draft standard, and then standard protocols, the designation of a
      protocol as experimental may sometimes be meant to suggest that
      the protocol, although perhaps mature, is not intended for
      operational use.







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   4.1.5.  Informational Protocol

      Protocols developed by other standard organizations, or vendors,
      or that are for other reasons outside the purview of the IESG, may
      be published as RFCs for the convenience of the Internet community
      as informational protocols.

   4.1.6.  Historic Protocol

      These are protocols that are unlikely to ever become standards in
      the Internet either because they have been superseded by later
      developments or due to lack of interest.

4.2.  Definitions of Protocol Status

      This document lists a "requirement level" or STATUS for each
      protocol.  The status is one of "required", "recommended",
      "elective", "limited use", or "not recommended".

   4.2.1.  Required Protocol

      A system must implement the required protocols.

   4.2.2.  Recommended Protocol

      A system should implement the recommended protocols.

   4.2.3.  Elective Protocol

      A system may or may not implement an elective protocol. The
      general notion is that if you are going to do something like this,
      you must do exactly this.  There may be several elective protocols
      in a general area, for example, there are several electronic mail
      protocols, and several routing protocols.

   4.2.4.  Limited Use Protocol

      These protocols are for use in limited circumstances.  This may be
      because of their experimental state, specialized nature, limited
      functionality, or historic state.

   4.2.5.  Not Recommended Protocol

      These protocols are not recommended for general use.  This may be
      because of their limited functionality, specialized nature, or
      experimental or historic state.





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5.  The Standards Track

   This section discusses in more detail the procedures used by the RFC
   Editor and the IESG in making decisions about the labeling and
   publishing of protocols as standards.

5.1.  The RFC Processing Decision Table

   Here is the current decision table for processing submissions by the
   RFC Editor.  The processing depends on who submitted it, and the
   status they want it to have.

      +==========================================================+
      |**************|               S O U R C E                 |
      +==========================================================+
      | Desired      |    IAB   |   IESG   |   IRSG   |  Other   |
      | Status       |          |          |          |          |
      +==========================================================+
      |              |          |          |          |          |
      | Standard     |  Bogus   |  Publish |  Bogus   |  Bogus   |
      | or           |   (2)    |   (1)    |   (2)    |   (2)    |
      | Draft        |          |          |          |          |
      | Standard     |          |          |          |          |
      +--------------+----------+----------+----------+----------+
      |              |          |          |          |          |
      |              |  Refer   |  Publish |  Refer   |  Refer   |
      | Proposed     |   (3)    |   (1)    |   (3)    |   (3)    |
      | Standard     |          |          |          |          |
      |              |          |          |          |          |
      +--------------+----------+----------+----------+----------+
      |              |          |          |          |          |
      |              |  Notify  |  Publish |  Notify  |  Notify  |
      | Experimental |   (4)    |   (1)    |   (4)    |   (4)    |
      | Protocol     |          |          |          |          |
      |              |          |          |          |          |
      +--------------+----------+----------+----------+----------+
      |              |          |          |          |          |
      | Information  |  Publish |  Publish |Discretion|Discretion|
      | or Opinion   |   (1)    |   (1)    |   (5)    |   (5)    |
      | Paper        |          |          |          |          |
      |              |          |          |          |          |
      +==========================================================+

      (1) Publish.

      (2) Bogus.  Inform the source of the rules.  RFCs specifying
          Standard, or Draft Standard must come from the IESG, only.




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      (3) Refer to an Area Director for review by a WG.  Expect to see
          the document again only after approval by the IESG.

      (4) Notify both the IESG and IRSG.  If no concerns are raised in
          two weeks then do Discretion (5), else RFC Editor to resolve
          the concerns or do Refer (3).

      (5) RFC Editor's discretion.  The RFC Editor decides if a review
          is needed and if so by whom.  RFC Editor decides to publish or
          not.

   Of course, in all cases the RFC Editor can request or make minor
   changes for style, format, and presentation purposes.

   The IESG has designated the IESG Secretary as its agent for
   forwarding documents with IESG approval and for registering concerns
   in response to notifications (4) to the RFC Editor.  Documents from
   Area Directors or Working Group Chairs may be considered in the same
   way as documents from "other".

5.2.  The Standards Track Diagram

   There is a part of the STATUS and STATE categorization that is called
   the standards track.  Actually, only the changes of state are
   significant to the progression along the standards track, though the
   status assignments may change as well.

   The states illustrated by single line boxes are temporary states,
   those illustrated by double line boxes are long term states.  A
   protocol will normally be expected to remain in a temporary state for
   several months (minimum six months for proposed standard, minimum
   four months for draft standard).  A protocol may be in a long term
   state for many years.

   A protocol may enter the standards track only on the recommendation
   of the IESG; and may move from one state to another along the track
   only on the recommendation of the IESG.  That is, it takes action by
   the IESG to either start a protocol on the track or to move it along.

   Generally, as the protocol enters the standards track a decision is
   made as to the eventual STATUS, requirement level or applicability
   (elective, recommended, or required) the protocol will have, although
   a somewhat less stringent current status may be assigned, and it then
   is placed in the the proposed standard STATE with that status.  So
   the initial placement of a protocol is into state 1.  At any time the
   STATUS decision may be revisited.





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         |
         +<----------------------------------------------+
         |                                               ^
         V    0                                          |    4
   +-----------+                                   +===========+
   |   enter   |-->----------------+-------------->|experiment |
   +-----------+                   |               +=====+=====+
                                   |                     |
                                   V    1                |
                             +-----------+               V
                             | proposed  |-------------->+
                        +--->+-----+-----+               |
                        |          |                     |
                        |          V    2                |
                        +<---+-----+-----+               V
                             | draft std |-------------->+
                        +--->+-----+-----+               |
                        |          |                     |
                        |          V    3                |
                        +<---+=====+=====+               V
                             | standard  |-------------->+
                             +=====+=====+               |
                                                         |
                                                         V    5
                                                   +=====+=====+
                                                   | historic  |
                                                   +===========+

   The transition from proposed standard (1) to draft standard (2) can
   only be by action of the IESG and only after the protocol has been
   proposed standard (1) for at least six months.

   The transition from draft standard (2) to standard (3) can only be by
   action of the IESG and only after the protocol has been draft
   standard (2) for at least four months.

   Occasionally, the decision may be that the protocol is not ready for
   standardization and will be assigned to the experimental state (4).
   This is off the standards track, and the protocol may be resubmitted
   to enter the standards track after further work.  There are other
   paths into the experimental and historic states that do not involve
   IESG action.

   Sometimes one protocol is replaced by another and thus becomes
   historic, or it may happen that a protocol on the standards track is
   in a sense overtaken by another protocol (or other events) and
   becomes historic (state 5).




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6.  The Protocols

   Subsection 6.1 lists recent RFCs and other changes.  Subsections 6.2
   - 6.10 list the standards in groups by protocol state.

6.1.  Recent Changes

6.1.1.  New RFCs:

      2109 - HTTP State Management Mechanism

             A Proposed Standard protocol.

      2108 - Definitions of Managed Objects for IEEE 802.3 Repeater
             Devices using SMIv2

             A Proposed Standard protocol.

      2107 - Ascend Tunnel Management Protocol - ATMP

             This is an information document and does not specify any
             level of standard.

      2106 - Data Link Switching Remote Access Protocol

             This is an information document and does not specify any
             level of standard.

      2105 - Cisco Systems' Tag Switching Architecture Overview

             This is an information document and does not specify any
             level of standard.

      2104 - HMAC: Keyed-Hashing for Message Authentication

             This is an information document and does not specify any
             level of standard.

      2103 - Mobility Support for Nimrod :  Challenges and Solution
             Approaches

             This is an information document and does not specify any
             level of standard.

      2102 - Multicast Support for Nimrod :  Requirements and Solution
             Approaches

             This is an information document and does not specify any



Internet Architecture Board Standards Track                    [Page 13]
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RFC 2000                   Internet Standards              February 1997


             level of standard.

      2101 - IPv4 Address Behaviour Today

             This is an information document and does not specify any
             level of standard.

      2100 - not yet issued.

      2099 - not yet issued.

      2098 - Toshiba's Router Architecture Extensions for ATM : Overview

             This is an information document and does not specify any
             level of standard.

      2097 - The PPP NetBIOS Frames Control Protocol (NBFCP)

             A Proposed Standard protocol.

      2096 - IP Forwarding Table MIB

             A Proposed Standard protocol.

      2095 - IMAP/POP AUTHorize Extension for Simple Challenge/Response

             A Proposed Standard protocol.

      2094 - not yet issued.

      2093 - not yet issued.

      2092 - Protocol Analysis for Triggered RIP

             This is an information document and does not specify any
             level of standard.

      2091 - Triggered Extensions to RIP to Support Demand Circuits

             A Proposed Standard protocol.

      2090 - TFTP Multicast Option

             An Experimental protocol.

      2089 - V2ToV1 Mapping SNMPv2 onto SNMPv1 within a bi-lingual SNMP
             agent




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RFC 2000                   Internet Standards              February 1997


             This is an information document and does not specify any
             level of standard.

      2088 - IMAP4 non-synchronizing literals

             A Proposed Standard protocol.

      2087 - IMAP4 QUOTA extension

             A Proposed Standard protocol.

      2086 - IMAP4 ACL extension

             A Proposed Standard protocol.

      2085 - HMAC-MD5 IP Authentication with Replay Prevention

             A Proposed Standard protocol.

      2084 - Considerations for Web Transaction Security

             This is an information document and does not specify any
             level of standard.

      2083 - PNG (Portable Network Graphics) Specification Version 1.0

             This is an information document and does not specify any
             level of standard.

      2082 - RIP-2 MD5 Authentication

             A Proposed Standard protocol.

      2081 - RIPng Protocol Applicability Statement

             This is an information document and does not specify any
             level of standard.

      2080 - RIPng for IPv6

             A Proposed Standard protocol.

      2079 - Definition of an X.500 Attribute Type and an Object Class
             to Hold Uniform Resource Identifiers (URIs)

             A Proposed Standard protocol.





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RFC 2000                   Internet Standards              February 1997


      2078 - Generic Security Service Application Program Interface,
             Version 2

             A Proposed Standard protocol.

      2077 - The Model Primary Content Type for Multipurpose Internet
             Mail Extension

             A Proposed Standard protocol.

      2076 - not yet issued.

      2075 - IP Echo Host Service

             An Experimental protocol.

      2074 - Remote Network Monitoring MIB Protocol Identifiers

             A Proposed Standard protocol.

      2073 - An IPv6 Provider-Based Unicast Address Format

             A Proposed Standard protocol.

      2072 - Router Renumbering Guide

             This is an information document and does not specify any
             level of standard.

      2071 - Network Renumbering Overview: Why would I want it and what
             is it anyway?

             This is an information document and does not specify any
             level of standard.

      2070 - Internationalization of the Hypertext Markup Language

             A Proposed Standard protocol.

      2069 - An Extension to HTTP : Digest Access Authentication

             A Proposed Standard protocol.

      2068 - Hypertext Transfer Protocol -- HTTP/1.1

             A Proposed Standard protocol.





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RFC 2000                   Internet Standards              February 1997


      2067 - IP over HIPPI

             A Draft Standard protocol.

      2066 - TELNET CHARSET Option

             An Experimental protocol.

      2065 - Domain Name System Security Extensions

             A Proposed Standard protocol.

      2064 - Traffic Flow Measurement:  Meter MIB

             An Experimental protocol.

      2063 - Traffic Flow Measurement:  Architecture

             An Experimental protocol.

      2062 - Internet Message Access Protocol - Obsolete Syntax

             This is an information document and does not specify any
             level of standard.

      2061 - IMAP4 Compatibility with IMAP2BIS

             This is an information document and does not specify any
             level of standard.

      2060 - Internet Message Access Protocol - Version 4rev1

             A Proposed Standard protocol.

      2059 - RADIUS Accounting

             This is an information document and does not specify any
             level of standard.

      2058 - Remote Authentication Dial In User Service (RADIUS)

             A Proposed Standard protocol.

      2057 - Source Directed Access Control on the Internet

             This is an information document and does not specify any
             level of standard.




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RFC 2000                   Internet Standards              February 1997


      2056 - Uniform Resource Locators for Z39.50

             A Proposed Standard protocol.

      2055 - WebNFS Server Specification

             This is an information document and does not specify any
             level of standard.

      2054 - WebNFS Client Specification

             This is an information document and does not specify any
             level of standard.

      2053 - The AM (Armenia) Domain

             This is an information document and does not specify any
             level of standard.

      2052 - A DNS RR for specifying the location of services (DNS SRV)

             An Experimental protocol.

      2051 - Definitions of Managed Objects for APPC using SMIv2

             A Proposed Standard protocol.

      2050 - Internet Registry IP Allocation Guidelines

             This is a Best Current Practices document and does not
             specify any level of standard.

      2049 - Multipurpose Internet Mail Extensions (MIME) Part Five:
             Conformance Criteria and Examples

             A Draft Standard protocol.

      2048 - Multipurpose Internet Mail Extensions (MIME) Part Four:
             Registration Procedures

             This is a Best Current Practices document and does not
             specify any level of standard.

      2047 - MIME (Multipurpose Internet Mail Extensions) Part Three:
             Message Header Extensions for Non-ASCII Text

             A Draft Standard protocol.




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RFC 2000                   Internet Standards              February 1997


      2046 - Multipurpose Internet Mail Extensions (MIME) Part Two:
             Media Types

             A Draft Standard protocol.

      2045 - Multipurpose Internet Mail Extensions (MIME) Part One:
             Format of Internet Message Bodies

             A Draft Standard protocol.

      2044 - UTF-8, a transformation format of Unicode and ISO 10646

             This is an information document and does not specify any
             level of standard.

      2043 - The PPP SNA Control Protocol (SNACP)

             A Proposed Standard protocol.

      2042 - Registering New BGP Attribute Types

             This is an information document and does not specify any
             level of standard.

      2041 - Mobile Network Tracing

             This is an information document and does not specify any
             level of standard.

      2040 - The RC5, RC5-CBC, RC5-CBC-Pad, and RC5-CTS Algorithms

             This is an information document and does not specify any
             level of standard.

      2039 - Applicablity of Standards Track MIBs to Management of World
             Wide Web Servers

             This is an information document and does not specify any
             level of standard.

      2038 - RTP Payload Format for MPEG1/MPEG2 Video

             A Proposed Standard protocol.

      2037 - Entity MIB using SMIv2

             A Proposed Standard protocol.




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RFC 2000                   Internet Standards              February 1997


      2036 - Observations on the use of Components of the Class A
             Address Space within the Internet

             This is an information document and does not specify any
             level of standard.

      2035 - RTP Payload Format for JPEG-compressed Video

             A Proposed Standard protocol.

      2034 - SMTP Service Extension for Returning Enhanced Error Codes

             A Proposed Standard protocol.

      2033 - Local Mail Transfer Protocol

             This is an information document and does not specify any
             level of standard.

      2032 - RTP Payload Format for H.261 Video Streams

             A Proposed Standard protocol.

      2031 - IETF-ISOC relationship

             This is an information document and does not specify any
             level of standard.

      2030 - Simple Network Time Protocol (SNTP) Version 4 for IPv4,
             IPv6 and OSI

             This is an information document and does not specify any
             level of standard.

      2029 - RTP Payload Format of Sun's CellB Video Encoding

             A Proposed Standard protocol.

      2028 - The Organizations Involved in the IETF Standards Process

             This is a Best Current Practices document and does not
             specify any level of standard.

      2027 - IAB and IESG Selection, Confirmation, and Recall Process:
             Operation of the Nominating and Recall Committees

             This is a Best Current Practices document and does not
             specify any level of standard.



Internet Architecture Board Standards Track                    [Page 20]
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RFC 2000                   Internet Standards              February 1997


      2026 - The Internet Standards Process -- Revision 3

             This is a Best Current Practices document and does not
             specify any level of standard.

      2025 - The Simple Public-Key GSS-API Mechanism (SPKM)

             A Proposed Standard protocol.

      2024 - Definitions of Managed Objects for Data Link Switching
             using SMIv2

             A Proposed Standard protocol.

      2023 - IP Version 6 over PPP

             A Proposed Standard protocol.

      2022 - Support for Multicast over UNI 3.0/3.1 based ATM Networks

             A Proposed Standard protocol.

      2021 - Remote Network Monitoring Management Information Base
             Version 2 using SMIv2

             A Proposed Standard protocol.

      2020 - IEEE 802.12 Interface MIB

             A Proposed Standard protocol.

      2019 - Transmission of IPv6 Packets Over FDDI

             A Proposed Standard protocol.

      2018 - TCP Selective Acknowledgement Options

             A Proposed Standard protocol.

      2017 - Definition of the URL MIME External-Body Access-Type

             A Proposed Standard protocol.

      2016 - Uniform Resource Agents (URAs)

             An Experimental protocol.





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RFC 2000                   Internet Standards              February 1997


      2015 - MIME Security with Pretty Good Privacy (PGP)

             A Proposed Standard protocol.

      2014 - IRTF Research Group Guidelines and Procedures

             This is a Best Current Practices document and does not
             specify any level of standard.

      2013 - SNMPv2 Management Information Base for the User Datagram
             Protocol using SMIv2

             A Proposed Standard protocol.

      2012 - SNMPv2 Management Information Base for the Transmission
             Control Protocol using SMIv2

             A Proposed Standard protocol.

      2011 - SNMPv2 Management Information Base for the Internet
             Protocol using SMIv2

             A Proposed Standard protocol.

      2010 - Operational Criteria for Root Name Servers

             This is an information document and does not specify any
             level of standard.

      2009 - GPS-Based Addressing and Routing

             An Experimental protocol.

      2008 - Implications of Various Address Allocation Policies for
             Internet Routing

             This is a Best Current Practices document and does not
             specify any level of standard.

      2007 - Catalogue of Network Training Materials

             This is an information document and does not specify any
             level of standard.

      2006 - The Definitions of Managed Objects for IP Mobility Support
             using SMIv2

             A Proposed Standard protocol.



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RFC 2000                   Internet Standards              February 1997


      2005 - Applicability Statement for IP Mobility Support

             A Proposed Standard protocol.

      2004 - Minimal Encapsulation within IP

             A Proposed Standard protocol.

      2003 - IP Encapsulation within IP

             A Proposed Standard protocol.

      2002 - IP Mobility Support

             A Proposed Standard protocol.

      2001 - TCP Slow Start, Congestion Avoidance, Fast Retransmit, and
             Fast Recovery Algorithms

             A Proposed Standard protocol.

      2000 - Internet Official Protocol Standards

             This memo.

      1999 - Request for Comments Summary RFC Numbers 1900-1999

             This is an information document and does not specify any
             level of standard.

      1998 - An Application of the BGP Community Attribute in Multi-home
             Routing

             This is an information document and does not specify any
             level of standard.

      1997 - BGP Communities Attribute

             A Proposed Standard protocol.

      1996 - A Mechanism for Prompt Notification of Zone Changes (DNS
             NOTIFY)

             A Proposed Standard protocol.

      1995 - Incremental Zone Transfer in DNS

             A Proposed Standard protocol.



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RFC 2000                   Internet Standards              February 1997


      1994 - PPP Challenge Handshake Authentication Protocol (CHAP)

             A Draft Standard protocol.

      1993 - PPP Gandalf FZA Compression Protocol

             This is an information document and does not specify any
             level of standard.

      1992 - The Nimrod Routing Architecture

             This is an information document and does not specify any
             level of standard.

      1991 - PGP Message Exchange Formats

             This is an information document and does not specify any
             level of standard.

      1990 - The PPP Multilink Protocol (MP)

             A Draft Standard protocol.

      1989 - PPP Link Quality Monitoring

             A Draft Standard protocol.

      1988 - Conditional Grant of Rights to Specific Hewlett-Packard
             Patents In Conjunction With the Internet Engineering Task
             Force's Internet-Standard Network Management Framework

             This is an information document and does not specify any
             level of standard.

      1987 - Ipsilon's General Switch Management Protocol Specification
             Version 1.1

             This is an information document and does not specify any
             level of standard.

      1986 - Experiments with a Simple File Transfer Protocol for Radio
             Links using Enhanced Trivial File Transfer Protocol (ETFTP)

             An Experimental protocol.

      1985 - SMTP Service Extension for Remote Message Queue Starting

             A Proposed Standard protocol.



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RFC 2000                   Internet Standards              February 1997


      1984 - IAB and IESG Statement on Cryptographic Technology and the
             Internet

             This is an information document and does not specify any
             level of standard.

      1983 - Internet Users' Glossary

             This is an information document and does not specify any
             level of standard.

      1982 - Serial Number Arithmetic

             A Proposed Standard protocol.

      1981 - Path MTU Discovery for IP version 6

             A Proposed Standard protocol.

      1980 - A Proposed Extension to HTML : Client-Side Image Maps

             This is an information document and does not specify any
             level of standard.

      1979 - PPP Deflate Protocol

             This is an information document and does not specify any
             level of standard.

      1978 - PPP Predictor Compression Protocol

             This is an information document and does not specify any
             level of standard.

      1977 - PPP BSD Compression Protocol

             This is an information document and does not specify any
             level of standard.

      1976 - PPP for Data Compression in Data Circuit-Terminating
             Equipment (DCE)

             This is an information document and does not specify any
             level of standard.

      1975 - PPP Magnalink Variable Resource Compression

             This is an information document and does not specify any



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RFC 2000                   Internet Standards              February 1997


             level of standard.

      1974 - PPP Stac LZS Compression Protocol

             This is an information document and does not specify any
             level of standard.

      1973 - PPP in Frame Relay

             A Proposed Standard protocol.

      1972 - A Method for the Transmission of IPv6 Packets over Ethernet
             Networks

             A Proposed Standard protocol.

      1971 - IPv6 Stateless Address Autoconfiguration

             A Proposed Standard protocol.

      1970 - Neighbor Discovery for IP Version 6 (IPv6)

             A Proposed Standard protocol.

      1969 - The PPP DES Encryption Protocol (DESE)

             This is an information document and does not specify any
             level of standard.

      1968 - The PPP Encryption Control Protocol (ECP)

             A Proposed Standard protocol.

      1967 - PPP LZS-DCP Compression Protocol (LZS-DCP)

             This is an information document and does not specify any
             level of standard.

      1966 - BGP Route Reflection An alternative to full mesh IBGP

             An Experimental protocol.

      1965 - Autonomous System Confederations for BGP

             An Experimental protocol.






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RFC 2000                   Internet Standards              February 1997


      1964 - The Kerberos Version 5 GSS-API Mechanism

             A Proposed Standard protocol.

      1963 - PPP Serial Data Transport Protocol (SDTP)

             This is an information document and does not specify any
             level of standard.

      1962 - The PPP Compression Control Protocol (CCP)

             A Proposed Standard protocol.

      1961 - GSS-API Authentication Method for SOCKS Version 5

             A Proposed Standard protocol.

      1960 - A String Representation of LDAP Search Filters

             A Proposed Standard protocol.

      1959 - An LDAP URL Format

             A Proposed Standard protocol.

      1958 - Architectural Principles of the Internet

             This is an information document and does not specify any
             level of standard.

      1957 - Some Observations on Implementations of the Post Office
             Protocol (POP3)

             This is an information document and does not specify any
             level of standard.

      1956 - Registration in the MIL Domain

             This is an information document and does not specify any
             level of standard.

      1955 - New Scheme for Internet Routing and Addressing (ENCAPS) for
             IPNG

             This is an information document and does not specify any
             level of standard.





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RFC 2000                   Internet Standards              February 1997


      1954 - Transmission of Flow Labelled IPv4 on ATM Data Links
             Ipsilon Version 1.0

             This is an information document and does not specify any
             level of standard.

      1953 - Ipsilon Flow Management Protocol Specification for IPv4
             Version 1.0

             This is an information document and does not specify any
             level of standard.

      1952 - GZIP file format specification version 4.3

             This is an information document and does not specify any
             level of standard.

      1951 - DEFLATE Compressed Data Format Specification version 1.3

             This is an information document and does not specify any
             level of standard.

      1950 - ZLIB Compressed Data Format Specification version 3.3

             This is an information document and does not specify any
             level of standard.

      1949 - Scalable Multicast Key Distribution

             An Experimental protocol.

      1948 - Defending Against Sequence Number Attacks

             This is an information document and does not specify any
             level of standard.

      1947 - Greek Character Encoding for Electronic Mail Messages

             This is an information document and does not specify any
             level of standard.

      1946 - Native ATM Support for ST2+

             This is an information document and does not specify any
             level of standard.






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RFC 2000                   Internet Standards              February 1997


      1945 - Hypertext Transfer Protocol -- HTTP/1.0

             This is an information document and does not specify any
             level of standard.

      1944 - Benchmarking Methodology for Network Interconnect Devices

             This is an information document and does not specify any
             level of standard.

      1943 - Building an X.500 Directory Service in the US

             This is an information document and does not specify any
             level of standard.

      1942 - HTML Tables

             An Experimental protocol.

      1941 - Frequently Asked Questions for Schools

             This is an information document and does not specify any
             level of standard.

      1940 - Source Demand Routing: Packet Format and Forwarding
             Specification

             This is an information document and does not specify any
             level of standard.

      1939 - Post Office Protocol - Version 3

             A Standard protocol.

      1938 - A One-Time Password System

             A Proposed Standard protocol.

      1937 - "Local/Remote" Forwarding Decision in Switched Data Link
             Subnetworks

             This is an information document and does not specify any
             level of standard.

      1936 - Implementing the Internet Checksum in Hardware

             This is an information document and does not specify any
             level of standard.



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RFC 2000                   Internet Standards              February 1997


      1935 - What is the Internet, Anyway?

             This is an information document and does not specify any
             level of standard.

      1934 - Ascend's Multilink Protocol Plus (MP+)

             This is an information document and does not specify any
             level of standard.

      1933 - Transition Mechanisms for IPv6 Hosts and Routers

             A Proposed Standard protocol.

      1932 - IP over ATM: A Framework Document

             This is an information document and does not specify any
             level of standard.

      1931 - Dynamic RARP Extensions for Automatic Network Address
             Acquisition

             This is an information document and does not specify any
             level of standard.

      1930 - Guidelines for creation, selection, and registration of an
             Autonomous System (AS)

             This is a Best Current Practices document and does not
             specify any level of standard.

      1929 - Username/Password Authentication for SOCKS V5

             A Proposed Standard protocol.

      1928 - SOCKS Protocol Version 5

             A Proposed Standard protocol.

      1927 - Suggested Additional MIME Types for Associating Documents

             This is an information document and does not specify any
             level of standard.

      1926 - An Experimental Encapsulation of IP Datagrams on Top of ATM

             This is an information document and does not specify any
             level of standard.



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RFC 2000                   Internet Standards              February 1997


      1925 - The Twelve Networking Truths

             This is an information document and does not specify any
             level of standard.

      1924 - A Compact Representation of IPv6 Addresses

             This is an information document and does not specify any
             level of standard.

      1923 - RIPv1 Applicability Statement for Historic Status

             This is an information document and does not specify any
             level of standard.

      1922 - Chinese Character Encoding for Internet Messages

             This is an information document and does not specify any
             level of standard.

      1921 - TNVIP Protocol

             This is an information document and does not specify any
             level of standard.

      1919 - Classical versus Transparent IP Proxies

             This is an information document and does not specify any
             level of standard.

      1899 - Request for Comments Summary RFC Numbers 1800-1899

             This is an information document and does not specify any
             level of standard.

      1799 - Request for Comments Summary RFC Numbers 1700-1799

             This is an information document and does not specify any
             level of standard.

      1699 - Request for Comments Summary RFC Numbers 1600-1699

             This is an information document and does not specify any
             level of standard.

      1599 - Request for Comments Summary RFC Numbers 1500-1599

             This is an information document and does not specify any



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RFC 2000                   Internet Standards              February 1997


             level of standard.

      1499 - Request for Comments Summary RFC Numbers 1400-1499

             This is an information document and does not specify any
             level of standard.

      1399 - Request for Comments Summary RFC Numbers 1300-1399

             This is an information document and does not specify any
             level of standard.

      1299 - Request for Comments Summary RFC Numbers 1200-1299

             This is an information document and does not specify any
             level of standard.

6.1.2.  Other Changes:

   The following are changes to protocols listed in the previous
   edition.

      2067 - IP over HIPPI

             Elevated to Draft Standard.

      2049 - Multipurpose Internet Mail Extensions (MIME) Part Five:
             Conformance Criteria and Examples

             Elevated to Draft Standard.

      2047 - MIME (Multipurpose Internet Mail Extensions) Part Three:
             Message Header Extensions for Non-ASCII Text

             Elevated to Draft Standard.

      2046 - Multipurpose Internet Mail Extensions (MIME) Part Two:
             Media Types

             Elevated to Draft Standard.

      2045 - Multipurpose Internet Mail Extensions (MIME) Part One:
             Format of Internet Message Bodies

             Elevated to Draft Standard.






Internet Architecture Board Standards Track                    [Page 32]
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RFC 2000                   Internet Standards              February 1997


      1994 - PPP Challenge Handshake Authentication Protocol (CHAP)

             Elevated to Draft Standard.

      1990 - The PPP Multilink Protocol (MP)

             Elevated to Draft Standard.

      1989 - PPP Link Quality Monitoring

             Elevated to Draft Standard.

      1939 - Post Office Protocol - Version 3

             Elevated to Standard.

      1108 - U.S. Department of Defense Security Options for the
             Internet Protocol

             Moved to Historic.































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RFC 2000                   Internet Standards              February 1997


6.2.  Standard Protocols

Protocol   Name                                      Status    RFC STD *
========   =====================================     ======== ==== === =
--------   Internet Official Protocol Standards      Req      2000   1
--------   Assigned Numbers                          Req      1700   2
--------   Host Requirements - Communications        Req      1122   3
--------   Host Requirements - Applications          Req      1123   3
IP         Internet Protocol                         Req       791   5
            as amended by:--------
--------     IP Subnet Extension                     Req       950   5
--------     IP Broadcast Datagrams                  Req       919   5
--------     IP Broadcast Datagrams with Subnets     Req       922   5
ICMP       Internet Control Message Protocol         Req       792   5
IGMP       Internet Group Multicast Protocol         Rec      1112   5
UDP        User Datagram Protocol                    Rec       768   6
TCP        Transmission Control Protocol             Rec       793   7
TELNET     Telnet Protocol                           Rec   854,855   8
FTP        File Transfer Protocol                    Rec       959   9
SMTP       Simple Mail Transfer Protocol             Rec       821  10
SMTP-SIZE  SMTP Service Ext for Message Size         Rec      1870  10
SMTP-EXT   SMTP Service Extensions                   Rec      1869  10
MAIL       Format of Electronic Mail Messages        Rec       822  11
CONTENT    Content Type Header Field                 Rec      1049  11
NTPV2      Network Time Protocol (Version 2)         Rec      1119  12
DOMAIN     Domain Name System                        Rec 1034,1035  13
DNS-MX     Mail Routing and the Domain System        Rec       974  14
SNMP       Simple Network Management Protocol        Rec      1157  15
SMI        Structure of Management Information       Rec      1155  16
Concise-MIB Concise MIB Definitions                  Rec      1212  16
MIB-II     Management Information Base-II            Rec      1213  17
NETBIOS    NetBIOS Service Protocols                 Ele 1001,1002  19
ECHO       Echo Protocol                             Rec       862  20
DISCARD    Discard Protocol                          Ele       863  21
CHARGEN    Character Generator Protocol              Ele       864  22
QUOTE      Quote of the Day Protocol                 Ele       865  23
USERS      Active Users Protocol                     Ele       866  24
DAYTIME    Daytime Protocol                          Ele       867  25
TIME       Time Server Protocol                      Ele       868  26
TFTP       Trivial File Transfer Protocol            Ele      1350  33
TP-TCP     ISO Transport Service on top of the TCP   Ele      1006  35
ETHER-MIB  Ethernet MIB                              Ele      1643  50
PPP        Point-to-Point Protocol (PPP)             Ele      1661  51
PPP-HDLC   PPP in HDLC Framing                       Ele      1662  51
IP-SMDS    IP Datagrams over the SMDS Service        Ele      1209  52
POP3       Post Office Protocol, Version 3           Ele      1939  53 *





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RFC 2000                   Internet Standards              February 1997


[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

Applicability Statements:

   IGMP -- The Internet Architecture Board intends to move towards
   general adoption of IP multicasting, as a more efficient solution
   than broadcasting for many applications.  The host interface has been
   standardized in RFC-1112; however, multicast-routing gateways are in
   the experimental stage and are not widely available.  An Internet
   host should support all of RFC-1112, except for the IGMP protocol
   itself which is optional; see RFC-1122 for more details.  Even
   without IGMP, implementation of RFC-1112 will provide an important
   advance: IP-layer access to local network multicast addressing.  It
   is expected that IGMP will become recommended for all hosts and
   gateways at some future date.

   SMI, MIB-II SNMP -- The Internet Architecture Board recommends that
   all IP and TCP implementations be network manageable.  At the current
   time, this implies implementation of the Internet MIB-II (RFC-1213),
   and at least the recommended management protocol SNMP (RFC-1157).

   RIP -- The Routing Information Protocol (RIP) is widely implemented
   and used in the Internet.  However, both implementors and users
   should be aware that RIP has some serious technical limitations as a
   routing protocol.  The IETF is currently devpeloping several
   candidates for a new standard "open" routing protocol with better
   properties than RIP.  The IAB urges the Internet community to track
   these developments, and to implement the new protocol when it is
   standardized; improved Internet service will result for many users.

   TP-TCP -- As OSI protocols become more widely implemented and used,
   there will be an increasing need to support interoperation with the
   TCP/IP protocols.  The Internet Engineering Task Force is formulating
   strategies for interoperation.  RFC-1006 provides one interoperation
   mode, in which TCP/IP is used to emulate TP0 in order to support OSI
   applications.  Hosts that wish to run OSI connection-oriented
   applications in this mode should use the procedure described in RFC-
   1006.  In the future, the IAB expects that a major portion of the
   Internet will support both TCP/IP and OSI (inter-)network protocols
   in parallel, and it will then be possible to run OSI applications
   across the Internet using full OSI protocol "stacks".









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RFC 2000                   Internet Standards              February 1997


6.3.  Network-Specific Standard Protocols

All Network-Specific Standards have Elective status.

Protocol   Name                                    State    RFC   STD *
========   =====================================   =====   =====  === =
IP-ATM     Classical IP and ARP over ATM            Prop   1577
IP-FR      Multiprotocol over Frame Relay           Draft  1490
ATM-ENCAP  Multiprotocol Encapsulation over ATM     Prop   1483
IP-TR-MC   IP Multicast over Token-Ring LANs        Prop   1469
IP-FDDI    Transmission of IP and ARP over FDDI Net Std    1390    36
IP-X.25    X.25 and ISDN in the Packet Mode         Draft  1356
IP-FDDI    Internet Protocol on FDDI Networks       Draft  1188
ARP        Address Resolution Protocol              Std     826    37
RARP       A Reverse Address Resolution Protocol    Std     903    38
IP-ARPA    Internet Protocol on ARPANET             Std BBN1822    39
IP-WB      Internet Protocol on Wideband Network    Std     907    40
IP-E       Internet Protocol on Ethernet Networks   Std     894    41
IP-EE      Internet Protocol on Exp. Ethernet Nets  Std     895    42
IP-IEEE    Internet Protocol on IEEE 802            Std    1042    43
IP-DC      Internet Protocol on DC Networks         Std     891    44
IP-HC      Internet Protocol on Hyperchannel        Std    1044    45
IP-ARC     Transmitting IP Traffic over ARCNET Nets Std    1201    46
IP-SLIP    Transmission of IP over Serial Lines     Std    1055    47
IP-NETBIOS Transmission of IP over NETBIOS          Std    1088    48
IP-IPX     Transmission of 802.2 over IPX Networks  Std    1132    49
IP-HIPPI   IP over HIPPI                            Draft  2067       *

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

Applicability Statements:

   It is expected that a system will support one or more physical
   networks and for each physical network supported the appropriate
   protocols from the above list must be supported.  That is, it is
   elective to support any particular type of physical network, and for
   the physical networks actually supported it is required that they be
   supported exactly according to the protocols in the above list.  See
   also the Host and Gateway Requirements RFCs for more specific
   information on network-specific ("link layer") protocols.










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RFC 2000                   Internet Standards              February 1997


6.4.  Draft Standard Protocols

Protocol   Name                                     Status          RFC
========   =====================================    ============== =====
MIME-CONF  MIME Conformance Criteria                Elective       2049*
MIME-MSG   MIME Msg Header Ext for Non-ASCII        Elective       2047*
MIME-MEDIA MIME Media Types                         Elective       2046*
MIME       Multipurpose Internet Mail Extensions    Elective       2045*
PPP-CHAP   PPP Challenge Handshake Authentication   Elective       1994*
PPP-MP     PPP Multilink Protocol                   Elective       1990*
PPP-LINK   PPP Link Quality Monitoring              Elective       1989*
COEX-MIB   Coexistence between SNMPV1 & SNMPV2      Elective       1908
SNMPv2-MIB MIB for SNMPv2                           Elective       1907
TRANS-MIB  Transport Mappings for SNMPv2            Elective       1906
OPS-MIB    Protocol Operations for SNMPv2           Elective       1905
CONF-MIB   Conformance Statements for SNMPv2        Elective       1904
CONV-MIB   Textual Conventions for SNMPv2           Elective       1903
SMIV2      SMI for SNMPv2                           Elective       1902
CON-MD5    Content-MD5 Header Field                 Elective       1864
OSPF-MIB   OSPF Version 2 MIB                       Elective       1850
STR-REP    String Representation ...                Elective       1779
X.500syn   X.500 String Representation ...          Elective       1778
X.500lite  X.500 Lightweight ...                    Elective       1777
BGP-4-APP  Application of BGP-4                     Elective       1772
BGP-4      Border Gateway Protocol 4                Elective       1771
PPP-DNCP   PPP DECnet Phase IV Control Protocol     Elective       1762
RMON-MIB   Remote Network Monitoring MIB            Elective       1757
802.5-MIB  IEEE 802.5 Token Ring MIB                Elective       1748
BGP-4-MIB  BGP-4 MIB                                Elective       1657
RIP2-MIB   RIP Version 2 MIB Extension              Elective       1724
RIP2       RIP Version 2-Carrying Additional Info.  Elective       1723
RIP2-APP   RIP Version 2 Protocol App. Statement    Elective       1722
SIP-MIB    SIP Interface Type MIB                   Elective       1694
-------    Def Man Objs Parallel-printer-like       Elective       1660
-------    Def Man Objs RS-232-like                 Elective       1659
-------    Def Man Objs Character Stream            Elective       1658
SMTP-8BIT  SMTP Service Ext or 8bit-MIMEtransport   Elective       1652
OSI-NSAP   Guidelines for OSI NSAP Allocation       Elective       1629
OSPF2      Open Shortest Path First Routing V2      Elective       1583
ISO-TS-ECHO Echo for ISO-8473                       Elective       1575
DECNET-MIB DECNET MIB                               Elective       1559
802.3-MIB  IEEE 802.3 Repeater MIB                  Elective       1516
BRIDGE-MIB BRIDGE-MIB                               Elective       1493
NTPV3      Network Time Protocol (Version 3)        Elective       1305
IP-MTU     Path MTU Discovery                       Elective       1191
FINGER     Finger Protocol                          Elective       1288
BOOTP      Bootstrap Protocol                      Recommended 951,1533
NICNAME    WhoIs Protocol                           Elective        954



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RFC 2000                   Internet Standards              February 1997


[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

Applicability Statements:

   PPP -- Point to Point Protocol is a method of sending IP over serial
   lines, which are a type of physical network.  It is anticipated that
   PPP will be advanced to the network-specifics standard protocol state
   in the future.

6.5.  Proposed Standard Protocols

Protocol   Name                                     Status          RFC
========   =====================================    ============== =====
HTTP-STATE HTTP State Management Mechanism          Elective       2109*
802.3-MIB  802.3 Repeater MIB using SMIv2           Elective       2108*
PPP-NBFCP  PPP NetBIOS Frames Control Protocol      Elective       2097*
TABLE-MIB  IP Forwarding Table MIB                  Elective       2096*
IMAPPOPAU  IMAP/POP AUTHorize Extension             Elective       2095*
RIP-TRIG   Trigger RIP                              Elective       2091*
IMAP4-LIT  IMAP4 non-synchronizing literals         Elective       2088*
IMAP4-QUO  IMAP4 QUOTA extension                    Elective       2087*
IMAP4-ACL  IMAP4 ACL Extension                      Elective       2086*
HMAC-MD5   HMAC-MD5 IP Auth. with Replay Prevention Elective       2085*
RIP2-MD5   RIP-2 MD5 Authentication                 Elective       2082*
RIPNG-IPV6 RIPng for IPv6                           Elective       2080*
URI-ATT    URI Attribute Type and Object Class      Elective       2079*
GSSAP      Generic Security Service Application     Elective       2078*
MIME-MODEL Model Primary MIME Types                 Elective       2077*
RMON-MIB   Remote Network Monitoring MIB            Elective       2074*
IPV6-UNI   IPv6 Provider-Based Unicast Address      Elective       2073*
HTML-INT   HTML Internationalization                Elective       2070*
DAA        Digest Access Authentication             Elective       2069*
HTTP-1.1   Hypertext Transfer Protocol -- HTTP/1.1  Elective       2068*
DNS-SEC    Domain Name System Security Extensions   Elective       2065*
IMAPV4     Internet Message Access Protocol v4rev1  Elective       2060*
RADIUS     Remote Authentication Dial In User Serv  Elective       2058*
URLZ39.50  Uniform Resource Locators for Z39.50     Elective       2056*
SNANAU-APP SNANAU APPC MIB using SMIv2              Elective       2051*
PPP-SNACP  PPP SNA Control Protocol                 Elective       2043*
RTP-MPEG   RTP Payload Format for MPEG1/MPEG2       Elective       2038*
ENTITY-MIB Entity MIB using SMIv2                   Elective       2037*
RTP-JPEG   RTP Payload Format for JPEG-compressed   Elective       2035*
SMTP-ENH   SMTP Enhanced Error Codes                Elective       2034*
RTP-H.261  RTP Payload Format for H.261             Elective       2032*
RTP-CELLB  RTP Payload Format of Sun's CellB        Elective       2029*
SPKM       Simple Public-Key GSS-API Mechanism      Elective       2025*
DLSW-MIB   DLSw MIB using SMIv2                     Elective       2024*



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RFC 2000                   Internet Standards              February 1997


IPV6-PPP   IP Version 6 over PPP                    Elective       2023*
MULTI-UNI  Multicast over UNI 3.0/3.1 based ATM     Elective       2022*
RMON-MIB   RMON MIB using SMIv2                     Elective       2021*
802.12-MIB IEEE 802.12 Interface MIB                Elective       2020*
IPV6-FDDI  Transmission of IPv6 Packets Over FDDI   Elective       2019*
TCP-ACK    TCP Selective Acknowledgement Options    Elective       2018*
URL-ACC    URL Access-Type                          Elective       2017*
MIME-PGP   MIME Security with PGP                   Elective       2015*
MIB-UDP    SNMPv2 MIB for UDP                       Elective       2013*
MIB-TCP    SNMPv2 MIB for TCP                       Elective       2012*
MIB-IP     SNMPv2 MIB for IP                        Elective       2011*
MOBILEIPMIBMobile IP MIB Definition using SMIv2     Elective       2006*
MOBILEIPAPPApplicability Statement for IP Mobility  Elective       2005*
MINI-IP    Minimal Encapsulation within IP          Elective       2004*
IPENCAPIP  IP Encapsulation within IP               Elective       2003*
MOBILEIPSUPIP Mobility Support                      Elective       2002*
TCPSLOWSRT TCP Slow Start, Congestion Avoidance...  Elective       2001*
BGP-COMM   BGP Communities Attribute                Elective       1997*
DNS-NOTIFY Mech. for Notification of Zone Changes   Elective       1996*
DNS-IZT    Incremental Zone Transfer in DNS         Elective       1995*
SMTP-ETRN  SMTP Service Extension ETRN              Elective       1985*
SNA        Serial Number Arithmetic                 Elective       1982*
MTU-IPV6   Path MTU Discovery for IP version 6      Elective       1981*
PPP-FRAME  PPP in Frame Relay                       Elective       1973*
IPV6-ETHER Transmission IPv6 Packets Over Ethernet  Elective       1972*
IPV6-AUTO  IPv6 Stateless Address Autoconfiguation  Elective       1971*
IPV6-ND    Neighbor Discovery for IP Version 6      Elective       1970*
PPP-ECP    PPP Encryption Control Protocol          Elective       1968*
GSSAPI-KER Kerberos Version 5 GSS-API Mechanism     Elective       1964*
PPP-CCP    PPP Compression Control Protocol         Elective       1962*
GSSAPI-SOC GSS-API Auth for SOCKS Version 5         Elective       1961*
LDAP-STR   String Rep. of LDAP Search Filters       Elective       1960*
LDAP-URL   LDAP URL Format                          Elective       1959*
ONE-PASS   One-Time Password System                 Elective       1938*
TRANS-IPV6 Transition Mechanisms IPv6 Hosts/Routers Elective       1933*
AUTH-SOCKS Username Authentication for SOCKS V5     Elective       1929*
SOCKSV5    SOCKS Protocol Version 5                 Elective       1928*
WHOIS++M   How to Interact with a Whois++ Mesh      Elective       1914
WHOIS++A   Architecture of Whois++ Index Service    Elective       1913
DSN        Delivery Status Notifications            Elective       1894
EMS-CODE   Enhanced Mail System Status Codes        Elective       1893
MIME-RPT   Multipart/Report                         Elective       1892
SMTP-DSN   SMTP Delivery Status Notifications       Elective       1891
RTP-AV     RTP Audio/Video Profile                  Elective       1890
RTP        Transport Protocol for Real-Time Apps    Elective       1889
DNS-IPV6   DNS Extensions to support IPv6           Elective       1886
ICMPv6     ICMPv6 for IPv6                          Elective       1885
IPV6-Addr  IPv6 Addressing Architecture             Elective       1884



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RFC 2000                   Internet Standards              February 1997


IPV6       IPv6 Specification                       Elective       1883
HTML       Hypertext Markup Language - 2.0          Elective       1866
SMTP-Pipe  SMTP Serv. Ext. for Command Pipelining   Elective       1854
MIME-Sec   MIME Object Security Services            Elective       1848
MIME-Encyp MIME: Signed and Encrypted               Elective       1847
WHOIS++    Architecture of the WHOIS++ service      Elective       1835
--------   Binding Protocols for ONC RPC Version 2  Elective       1833
XDR        External Data Representation Standard    Elective       1832
RPC        Remote Procedure Call Protocol V. 2      Elective       1831
--------   ESP DES-CBC Transform                    Ele/Req        1829
--------   IP Authentication using Keyed MD5        Ele/Req        1828
ESP        IP Encapsulating Security Payload        Ele/Req        1827
IPV6-AH    IP Authentication Header                 Ele/Req        1826
--------   Security Architecture for IP             Ele/Req        1825
RREQ       Requirements for IP Version 4 Routers    Elective       1812
URL        Relative Uniform Resource Locators       Elective       1808
CLDAP      Connection-less LDAP                     Elective       1798
OSPF-DC    Ext. OSPF to Support Demand Circuits     Elective       1793
TMUX       Transport Multiplexing Protocol          Elective       1692
TFTP-Opt   TFTP Options                             Elective       1784
TFTP-Blk   TFTP Blocksize Option                    Elective       1783
TFTP-Ext   TFTP Option Extension                    Elective       1782
OSI-Dir    OSI User Friendly Naming ...             Elective       1781
MIME-EDI   MIME Encapsulation of EDI Objects        Elective       1767
Lang-Tag   Tags for Identification of Languages     Elective       1766
XNSCP      PPP XNS IDP Control Protocol             Elective       1764
BVCP       PPP Banyan Vines Control Protocol        Elective       1763
Print-MIB  Printer MIB                              Elective       1759
ATM-SIG    ATM Signaling Support for IP over ATM    Elective       1755
IPNG       Recommendation for IP Next Generation    Elective       1752
802.5-SSR  802.5 SSR MIB using SMIv2                Elective       1749
SDLCSMIv2  SNADLC SDLC MIB using SMIv2              Elective       1747
BGP4/IDRP  BGP4/IDRP for IP/OSPF Interaction        Elective       1745
AT-MIB     Appletalk MIB                            Elective       1742
MacMIME    MIME Encapsulation of Macintosh files    Elective       1740
URL        Uniform Resource Locators                Elective       1738
POP3-AUTH  POP3 AUTHentication command              Elective       1734
IMAP4-AUTH IMAP4 Authentication Mechanisms          Elective       1731
IMAP4      Internet Message Access Protocol V4      Elective       1730
RDBMS-MIB  RDMS MIB - using SMIv2                   Elective       1697
MODEM-MIB  Modem MIB - using SMIv2                  Elective       1696
ATM-MIB    ATM Management Version 8.0 using SMIv2   Elective       1695
SNANAU-MIB SNA NAUs MIB using SMIv2                 Elective       1665
PPP-TRANS  PPP Reliable Transmission                Elective       1663
BGP-4-IMP  BGP-4 Roadmap and Implementation         Elective       1656
--------   Postmaster Convention X.400 Operations   Elective       1648
TN3270-En  TN3270 Enhancements                      Elective       1647
PPP-BCP    PPP Bridging Control Protocol            Elective       1638



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RFC 2000                   Internet Standards              February 1997


UPS-MIB    UPS Management Information Base          Elective       1628
AAL5-MTU   Default IP MTU for use over ATM AAL5     Elective       1626
PPP-SONET  PPP over SONET/SDH                       Elective       1619
PPP-ISDN   PPP over ISDN                            Elective       1618
DNS-R-MIB  DNS Resolver MIB Extensions              Elective       1612
DNS-S-MIB  DNS Server MIB Extensions                Elective       1611
FR-MIB     Frame Relay Service MIB                  Elective       1604
PPP-X25    PPP in X.25                              Elective       1598
OSPF-NSSA  The OSPF NSSA Option                     Elective       1587
OSPF-Multi Multicast Extensions to OSPF             Elective       1584
SONET-MIB  MIB SONET/SDH Interface Type             Elective       1595
RIP-DC     Extensions to RIP to Support Demand Cir. Elective       1582
--------   Evolution of the Interfaces Group of MIB-II Elective    1573
PPP-LCP    PPP LCP Extensions                       Elective       1570
X500-MIB   X.500 Directory Monitoring MIB           Elective       1567
MAIL-MIB   Mail Monitoring MIB                      Elective       1566
NSM-MIB    Network Services Monitoring MIB          Elective       1565
CIPX       Compressing IPX Headers Over WAM Media   Elective       1553
IPXCP      PPP Internetworking Packet Exchange Control Elective    1552
DHCP-BOOTP Interoperation Between DHCP and BOOTP    Elective       1534
DHCP-BOOTP DHCP Options and BOOTP Vendor Extensions Elective       1533
BOOTP      Clarifications and Extensions BOOTP      Elective       1542
DHCP       Dynamic Host Configuration Protocol      Elective       1541
SRB-MIB    Source Routing Bridge MIB                Elective       1525
CIDR-STRA  CIDR Address Assignment...               Elective       1519
CIDR-ARCH  CIDR Architecture...                     Elective       1518
CIDR-APP   CIDR Applicability Statement             Elective       1517
--------   802.3 MAU MIB                            Elective       1515
HOST-MIB   Host Resources MIB                       Elective       1514
--------   Token Ring Extensions to RMON MIB        Elective       1513
FDDI-MIB   FDDI Management Information Base         Elective       1512
KERBEROS   Kerberos Network Authentication Ser (V5) Elective       1510
GSSAPI     Generic Security Service API: C-bindings Elective       1509
GSSAPI     Generic Security Service Application...  Elective       1508
DASS       Distributed Authentication Security...   Elective       1507
--------   X.400 Use of Extended Character Sets     Elective       1502
HARPOON    Rules for Downgrading Messages...        Elective       1496
Mapping    MHS/RFC-822 Message Body Mapping         Elective       1495
Equiv      X.400/MIME Body Equivalences             Elective       1494
IDPR       Inter-Domain Policy Routing Protocol     Elective       1479
IDPR-ARCH  Architecture for IDPR                    Elective       1478
PPP/Bridge MIB Bridge PPP MIB                       Elective       1474
PPP/IP MIB  IP Network Control Protocol of PPP MIB  Elective       1473
PPP/SEC MIB Security Protocols of PPP MIB           Elective       1472
PPP/LCP MIB Link Control Protocol of PPP MIB        Elective       1471
X25-MIB    Multiprotocol Interconnect on X.25 MIB   Elective       1461
SNMPv2     Coexistence between SNMPv1 and SNMPv2    Elective       1452
SNMPv2     Management Information Base for SNMPv2   Elective       1450



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RFC 2000                   Internet Standards              February 1997


SNMPv2     Transport Mappings for SNMPv2            Elective       1449
SNMPv2     Protocol Operations for SNMPv2           Elective       1448
SNMPv2     Conformance Statements for SNMPv2        Elective       1444
SNMPv2     Textual Conventions for SNMPv2           Elective       1443
SNMPv2     SMI for SNMPv2                           Elective       1442
SNMPv2     Introduction to SNMPv2                   Elective       1441
PEM-KEY    PEM - Key Certification                  Elective       1424
PEM-ALG    PEM - Algorithms, Modes, and Identifiers Elective       1423
PEM-CKM    PEM - Certificate-Based Key Management   Elective       1422
PEM-ENC    PEM - Message Encryption and Auth        Elective       1421
SNMP-IPX   SNMP over IPX                            Elective       1420
SNMP-AT    SNMP over AppleTalk                      Elective       1419
SNMP-OSI   SNMP over OSI                            Elective       1418
FTP-FTAM   FTP-FTAM Gateway Specification           Elective       1415
IDENT-MIB  Identification MIB                       Elective       1414
IDENT      Identification Protocol                  Elective       1413
DS3/E3-MIB DS3/E3 Interface Type                    Elective       1407
DS1/E1-MIB DS1/E1 Interface Type                    Elective       1406
BGP-OSPF   BGP OSPF Interaction                     Elective       1403
--------   Route Advertisement In BGP2 And BGP3     Elective       1397
SNMP-X.25  SNMP MIB Extension for X.25 Packet Layer Elective       1382
SNMP-LAPB  SNMP MIB Extension for X.25 LAPB         Elective       1381
PPP-ATCP   PPP AppleTalk Control Protocol           Elective       1378
PPP-OSINLCP PPP OSI Network Layer Control Protocol  Elective       1377
SNMP-PARTY-MIB Administration of SNMP               Elective       1353
SNMP-SEC   SNMP Security Protocols                  Elective       1352
SNMP-ADMIN SNMP Administrative Model                Elective       1351
TOS        Type of Service in the Internet          Elective       1349
PPP-IPCP   PPP Control Protocol                     Elective       1332
-------    X.400 1988 to 1984 downgrading           Elective       1328
-------    Mapping between X.400(1988)              Elective       1327
TCP-EXT    TCP Extensions for High Performance      Elective       1323
FRAME-MIB  Management Information Base for Frame    Elective       1315
NETFAX     File Format for the Exchange of Images   Elective       1314
IARP       Inverse Address Resolution Protocol      Elective       1293
FDDI-MIB   FDDI-MIB                                 Elective       1285
-------    Encoding Network Addresses               Elective       1277
-------    Replication and Distributed Operations   Elective       1276
-------    COSINE and Internet X.500 Schema         Elective       1274
BGP-MIB    Border Gateway Protocol MIB (Version 3)  Elective       1269
ICMP-ROUT  ICMP Router Discovery Messages           Elective       1256
OSI-UDP    OSI TS on UDP                            Elective       1240
STD-MIBs   Reassignment of Exp MIBs to Std MIBs     Elective       1239
IPX-IP     Tunneling IPX Traffic through IP Nets    Elective       1234
GINT-MIB   Extensions to the Generic-Interface MIB  Elective       1229
IS-IS      OSI IS-IS for TCP/IP Dual Environments   Elective       1195
IP-CMPRS   Compressing TCP/IP Headers               Elective       1144
NNTP       Network News Transfer Protocol           Elective        977



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RFC 2000                   Internet Standards              February 1997


[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

[Note: Ele/Req indicates elective for use with IPv4 and required for use
with IPv6.]

Applicability Statements:

   OSPF - RFC 1370 is an applicability statement for OSPF.










































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RFC 2000                   Internet Standards              February 1997


6.6.  Telnet Options

For convenience, all the Telnet Options are collected here with both
their state and status.

Protocol   Name                           Number  State Status  RFC STD
========   =====================================  ===== ====== ==== ===
TOPT-BIN   Binary Transmission                 0  Std   Rec     856  27
TOPT-ECHO  Echo                                1  Std   Rec     857  28
TOPT-RECN  Reconnection                        2  Prop  Ele     ...
TOPT-SUPP  Suppress Go Ahead                   3  Std   Rec     858  29
TOPT-APRX  Approx Message Size Negotiation     4  Prop  Ele     ...
TOPT-STAT  Status                              5  Std   Rec     859  30
TOPT-TIM   Timing Mark                         6  Std   Rec     860  31
TOPT-REM   Remote Controlled Trans and Echo    7  Prop  Ele     726
TOPT-OLW   Output Line Width                   8  Prop  Ele     ...
TOPT-OPS   Output Page Size                    9  Prop  Ele     ...
TOPT-OCRD  Output Carriage-Return Disposition 10  Prop  Ele     652
TOPT-OHT   Output Horizontal Tabstops         11  Prop  Ele     653
TOPT-OHTD  Output Horizontal Tab Disposition  12  Prop  Ele     654
TOPT-OFD   Output Formfeed Disposition        13  Prop  Ele     655
TOPT-OVT   Output Vertical Tabstops           14  Prop  Ele     656
TOPT-OVTD  Output Vertical Tab Disposition    15  Prop  Ele     657
TOPT-OLD   Output Linefeed Disposition        16  Prop  Ele     658
TOPT-EXT   Extended ASCII                     17  Prop  Ele     698
TOPT-LOGO  Logout                             18  Prop  Ele     727
TOPT-BYTE  Byte Macro                         19  Prop  Ele     735
TOPT-DATA  Data Entry Terminal                20  Prop  Ele    1043
TOPT-SUP   SUPDUP                             21  Prop  Ele     736
TOPT-SUPO  SUPDUP Output                      22  Prop  Ele     749
TOPT-SNDL  Send Location                      23  Prop  Ele     779
TOPT-TERM  Terminal Type                      24  Prop  Ele    1091
TOPT-EOR   End of Record                      25  Prop  Ele     885
TOPT-TACACS  TACACS User Identification       26  Prop  Ele     927
TOPT-OM    Output Marking                     27  Prop  Ele     933
TOPT-TLN   Terminal Location Number           28  Prop  Ele     946
TOPT-3270  Telnet 3270 Regime                 29  Prop  Ele    1041
TOPT-X.3   X.3 PAD                            30  Prop  Ele    1053
TOPT-NAWS  Negotiate About Window Size        31  Prop  Ele    1073
TOPT-TS    Terminal Speed                     32  Prop  Ele    1079
TOPT-RFC   Remote Flow Control                33  Prop  Ele    1372
TOPT-LINE  Linemode                           34  Draft Ele    1184
TOPT-XDL   X Display Location                 35  Prop  Ele    1096
TOPT-ENVIR Telnet Environment Option          36  Hist  Not    1408
TOPT-AUTH  Telnet Authentication Option       37  Exp   Ele    1416
TOPT-ENVIR Telnet Environment Option          39  Prop  Ele    1572
TOPT-TN3270E TN3270 Enhancements              40  Prop  Ele    1647*
TOPT-AUTH  Telnet XAUTH                       41  Exp              *



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RFC 2000                   Internet Standards              February 1997


TOPT-CHARSET Telnet CHARSET                   42  Exp          2066*
TOPT-EXTOP Extended-Options-List             255  Std   Rec     861  32

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

6.7.  Experimental Protocols

All Experimental protocols have the Limited Use status.

Protocol   Name                                                     RFC
========   =====================================                   =====
TFTP-MULTI TFTP Multicast Option                                   2090*
IP-Echo    IP Echo Host Service                                    2075*
METER-MIB  Traffic Flow Measurement Meter MIB                      2064*
TFM-ARCH   Traffic Flow Measurement Architecture                   2063*
DNS-SRV    Location of Services in the DNS                         2052*
URAS       Uniform Resource Agents                                 2016*
GPS-AR     GPS-Based Addressing and Routing                        2009*
ETFTP      Enhanced Trivial File Transfer Protocol                 1986*
BGP-RR     BGP Route Reflection                                    1966*
BGP-ASC    Autonomous System Confederations for BGP                1965*
SMKD       Scalable Multicast Key Distribution                     1949*
HTML-TBL   HTML Tables                                             1942*
MIME-VP    Voice Profile for Internet Mail                         1911
SNMPV2SM   User-based Security Model for SNMPv2                    1910
SNMPV2AI   SNMPv2 Administrative Infrastructure                    1909
SNMPV2CB   Introduction to Community-based SNMPv2                  1901
-------    IPv6 Testing Address Allocation                         1897
DNS-LOC    Location Information in the DNS                         1876
SGML-MT    SGML Media Types                                        1874
CONT-MT    Access Type Content-ID                                  1873
RELAT-MT   Multipart/Related                                       1872
UNARP      ARP Extension - UNARP                                   1868
-------    Form-based File Upload in HTML                          1867
-------    BGP/IDRP Route Server Alternative                       1863
-------    IP Authentication using Keyed SHA                       1852
ESP3DES    ESP Triple DES Transform                                1851
-------    SMTP 521 Reply Code                                     1846
-------    SMTP Serv. Ext. for Checkpoint/Restart                  1845
-------    X.500 Mapping X.400 and RFC 822 Addresses               1838
-------    Tables and Subtrees in the X.500 Directory              1837
-------    O/R Address hierarchy in X.500                          1836
-------    SMTP Serv. Ext. Large and Binary MIME Msgs.             1830
ST2        Stream Protocol Version 2                               1819
-------    Content-Disposition Header                              1806
-------    Schema Publishing in X.500 Directory                    1804
-------    X.400-MHS use X.500 to support X.400-MHS Routing        1801



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RFC 2000                   Internet Standards              February 1997


-------    Class A Subnet Experiment                               1797
TCP/IPXMIB TCP/IPX Connection Mib Specification                    1792
-------    TCP And UDP Over IPX Networks With Fixed Path MTU       1791
ICMP-DM    ICMP Domain Name Messages                               1788
CLNP-MULT  Host Group Extensions for CLNP Multicasting             1768
OSPF-OVFL  OSPF Database Overflow                                  1765
RWP        Remote Write ProtocolL - Version 1.0                    1756
NARP       NBMA Address Resolution Protocol                        1735
DNS-DEBUG  Tools for DNS debugging                                 1713
DNS-ENCODE DNS Encoding of Geographical Location                   1712
TCP-POS    An Extension to TCP: Partial Order Service              1693
-------    DNS to Distribute RFC1327 Mail Address Mapping Tables   1664
T/TCP      TCP Extensions for Transactions                         1644
UTF-7      A Mail-Safe Transformation Format of Unicode            1642
MIME-UNI   Using Unicode with MIME                                 1641
FOOBAR     FTP Operation Over Big Address Records                  1639
X500-CHART Charting Networks in the X.500 Directory                1609
X500-DIR   Representing IP Information in the X.500 Directory      1608
SNMP-DPI   SNMP Distributed Protocol Interface                     1592
CLNP-TUBA  Use of ISO CLNP in TUBA Environments                    1561
REM-PRINT  TPC.INT Subdomain Remote Printing - Technical           1528
EHF-MAIL   Encoding Header Field for Internet Messages             1505
REM-PRT    An Experiment in Remote Printing                        1486
RAP        Internet Route Access Protocol                          1476
TP/IX      TP/IX: The Next Internet                                1475
X400       Routing Coordination for X.400 Services                 1465
DNS        Storing Arbitrary Attributes in DNS                     1464
IRCP       Internet Relay Chat Protocol                            1459
TOS-LS     Link Security TOS                                       1455
SIFT/UFT   Sender-Initiated/Unsolicited File Transfer              1440
DIR-ARP    Directed ARP                                            1433
TEL-SPX    Telnet Authentication: SPX                              1412
TEL-KER    Telnet Authentication: Kerberos V4                      1411
MAP-MAIL   X.400 Mapping and Mail-11                               1405
TRACE-IP   Traceroute Using an IP Option                           1393
DNS-IP     Experiment in DNS Based IP Routing                      1383
RMCP       Remote Mail Checking Protocol                           1339
TCP-HIPER  TCP Extensions for High Performance                     1323
MSP2       Message Send Protocol 2                                 1312
DSLCP      Dynamically Switched Link Control                       1307
--------   X.500 and Domains                                       1279
IN-ENCAP   Internet Encapsulation Protocol                         1241
CLNS-MIB   CLNS-MIB                                                1238
CFDP       Coherent File Distribution Protocol                     1235
SNMP-DPI   SNMP Distributed Program Interface                      1228
IP-AX.25   IP Encapsulation of AX.25 Frames                        1226
ALERTS     Managing Asynchronously Generated Alerts                1224
MPP        Message Posting Protocol                                1204



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SNMP-BULK  Bulk Table Retrieval with the SNMP                      1187
DNS-RR     New DNS RR Definitions                                  1183
IMAP2      Interactive Mail Access Protocol                        1176
NTP-OSI    NTP over OSI Remote Operations                          1165
DMF-MAIL   Digest Message Format for Mail                          1153
RDP        Reliable Data Protocol                              908,1151
TCP-ACO    TCP Alternate Checksum Option                           1146
IP-DVMRP   IP Distance Vector Multicast Routing                    1075
VMTP       Versatile Message Transaction Protocol                  1045
COOKIE-JAR Authentication Scheme                                   1004
NETBLT     Bulk Data Transfer Protocol                              998
IRTP       Internet Reliable Transaction Protocol                   938
LDP        Loader Debugger Protocol                                 909
RLP        Resource Location Protocol                               887
NVP-II     Network Voice Protocol                              ISI-memo
PVP        Packet Video Protocol                               ISI-memo

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]
































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RFC 2000                   Internet Standards              February 1997


6.8.  Informational Protocols

Information protocols have no status.

Protocol   Name                                                     RFC
=======    ====================================                    =====
ATMP       Ascend Tunnel Management Protocol                       2107*
DLSRAP     Data Link Switching Remote Access Protocol              2106*
PNG        Portable Network Graphics Version 1.0                   2083*
RC5        RC5, RC5-CBC, RC5-CBC-Pad, and RC5-CTS Algorithms       2040*
SNTPv4     Simple Network Time Protocol v4 for IPv4, IPv6 and OSI  2030*
PGP-MEF    PGP Message Exchange Formats                            1991*
GSMP       Ipsilon's General Switch Management Protocol            1987*
PPP-DEFL   PPP Deflate Protocol                                    1979*
PPP-PRED   PPP Predictor Compression Protocol                      1978*
PPP-BSD    PPP BSD Compression Protocol                            1977*
PPP-DCE    PPP for Data Compression in DCE                         1976*
PPP-MAG    PPP Magnalink Variable Resource Compression             1975*
PPP-STAC   PPP Stac LZS Compression Protocol                       1974*
GZIP       GZIP File Format Specification Version 4.3              1952*
DEFLATE    DEFLATE Compressed Data Format Specification V. 1.3     1951*
ZLIB       ZLIB Compressed Data Format Specification V. 3.3        1950*
HTTP-1.0   Hypertext Transfer Protocol -- HTTP/1.0                 1945*
MP+        Ascend's Multilink Protocol Plus (MP+)                  1934*
CYBERCASH  CyberCash Credit Card Protocol Version 0.8              1898
--------   text/enriched MIME Content-type                         1896
--------   Application/CALS-1840 Content-type                      1895
--------   PPP IPCP Extensions for Name Server Addresses           1877
SNPP       Simple Network Paging Protocol - Version 2              1861
--------   ISO Transport Class 2 Non-use Explicit Flow Control     1859
           over TCP RFC1006 extension
--------   IP in IP Tunneling                                      1853
--------   PPP Network Control Protocol for LAN Extension          1841
TESS       The Exponential Security System                         1824
NFSV3      NFS Version 3 Protocol Specification                    1813
--------   A Format for Bibliographic Records                      1807
SDMD       IPv4 Option for Sender Directed MD Delivery             1770
SNTP       Simple Network Time Protocol                            1769
SNOOP      Snoop Version 2 Packet Capture File Format              1761
BINHEX     MIME Content Type for BinHex Encoded Files              1741
RWHOIS     Referral Whois Protocol                                 1714
DNS-NSAP   DNS NSAP Resource Records                               1706
RADIO-PAGE TPC.INT Subdomain: Radio Paging -- Technical Procedures 1703
GRE-IPv4   Generic Routing Encapsulation over IPv4                 1702
GRE        Generic Routing Encapsulatio                            1701
IPXWAN     Novell IPX Over Various WAN Media                       1634
ADSNA-IP   Advanced SNA/IP: A Simple SNA Transport Protocol        1538
AUBR       Appletalk Update-Based Routing Protocol...              1504



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TACACS     Terminal Access Control Protocol                        1492
SUN-NFS    Network File System Protocol                            1094
SUN-RPC    Remote Procedure Call Protocol Version 2                1057
GOPHER     The Internet Gopher Protocol                            1436
-------    Data Link Switching: Switch-to-Switch Protocol          1434
LISTSERV   Listserv Distribute Protocol                            1429
-------    Replication Requirements                                1275
PCMAIL     Pcmail Transport Protocol                               1056
MTP        Multicast Transport Protocol                            1301
BSD Login  BSD Login                                               1282
DIXIE      DIXIE Protocol Specification                            1249
IP-X.121   IP to X.121 Address Mapping for DDN                     1236
OSI-HYPER  OSI and LLC1 on HYPERchannel                            1223
HAP2       Host Access Protocol                                    1221
SUBNETASGN On the Assignment of Subnet Numbers                     1219
SNMP-TRAPS Defining Traps for use with SNMP                        1215
DAS        Directory Assistance Service                            1202
MD4        MD4 Message Digest Algorithm                            1186
LPDP       Line Printer Daemon Protocol                            1179

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

6.9.  Historic Protocols

All Historic protocols have Not Recommended status.

Protocol   Name                                                RFC  STD
========   =====================================              ===== ===
IPSO       DoD Security Options for IP              Elective  1108     *
SNMPv2     Manager-to-Manager MIB                   Elective  1451
SNMPv2     Party MIB for SNMPv2                     Elective  1447
SNMPv2     Security Protocols for SNMPv2            Elective  1446
SNMPv2     Administrative Model for SNMPv2          Elective  1445
RIP        Routing Information Protocol             Ele       1058  34
--------   Mapping full 822 to Restricted 822                 1137
BGP3       Border Gateway Protocol 3 (BGP-3)             1267,1268
--------   Gateway Requirements                      Req      1009   4
EGP        Exterior Gateway Protocol                 Rec       904  18
SNMP-MUX   SNMP MUX Protocol and MIB                          1227
OIM-MIB-II OSI Internet Management: MIB-II                    1214
IMAP3      Interactive Mail Access Protocol Version 3         1203
SUN-RPC    Remote Procedure Call Protocol Version 1           1050
802.4-MIP  IEEE 802.4 Token Bus MIB                           1230
CMOT       Common Management Information Services             1189
--------   Mail Privacy: Procedures                           1113
--------   Mail Privacy: Key Management                       1114
--------   Mail Privacy: Algorithms                           1115



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NFILE      A File Access Protocol                             1037
HOSTNAME   HOSTNAME Protocol                                   953
SFTP       Simple File Transfer Protocol                       913
SUPDUP     SUPDUP Protocol                                     734
BGP        Border Gateway Protocol                       1163,1164
MIB-I      MIB-I                                              1156
SGMP       Simple Gateway Monitoring Protocol                 1028
HEMS       High Level Entity Management Protocol              1021
STATSRV    Statistics Server                                   996
POP2       Post Office Protocol, Version 2                     937
RATP       Reliable Asynchronous Transfer Protocol             916
HFEP       Host - Front End Protocol                           929
THINWIRE   Thinwire Protocol                                   914
HMP        Host Monitoring Protocol                            869
GGP        Gateway Gateway Protocol                            823
RTELNET    Remote Telnet Service                               818
CLOCK      DCNET Time Server Protocol                          778
MPM        Internet Message Protocol                           759
NETRJS     Remote Job Service                                  740
NETED      Network Standard Text Editor                        569
RJE        Remote Job Entry                                    407
XNET       Cross Net Debugger                              IEN-158
NAMESERVER Host Name Server Protocol                       IEN-116
MUX        Multiplexing Protocol                            IEN-90
GRAPHICS   Graphics Protocol                             NIC-24308

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]























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RFC 2000                   Internet Standards              February 1997


6.10.  Obsolete Protocols

Some of the protocols listed in this memo are described in RFCs that are
obsoleted by newer RFCs.  "Obsolete" or "obsoleted" is not an official
state or status of protocols.  This subsection is for information only.

While it may seem to be obviously wrong to have an obsoleted RFC in the
list of standards, there may be cases when an older standard is in the
process of being replaced.  This process may take a year or two.

Many obsoleted protocols are of little interest and are dropped from
this memo altogether.  Some obsoleted protocols have received enough
recognition that it seems appropriate to list them under their current
status and with the following reference to their current replacement.

RFC            RFC   Status     Title                               *
====           ====  =========  =================================== =
1305 obsoletes 1119 Stan/Rec    Network Time Protocol version 2
1533 obsoletes 1497 Draf/Rec    BOOTP Vendor Information Extensions
2045 obsoletes 1522 Draf/Ele    MIME Part Two                       *
2045 obsoletes 1521 Draf/Ele    MIME Part One                       *
1939 obsoletes 1725 Draf/Ele    Post Office Protocol - Version 3    *
1390 obsoletes 1188 Draf/Elec   Transmission of IP and ARP over FDDI
2096 obsoletes 1354 Prop/Ele    IP Forwarding Table MIB             *
2078 obsoletes 1508 Prop/Ele    GSSAP Interface                     *
2067 obsoletes 1374 Prop/Ele    IP and ARP on HIPPI                 *
2060 obsoletes 1730 Prop/Ele    IMAP4rev1                           *
1994 obsoletes 1334 Prop/Ele    PPP Authentication Protocols        *
1990 obsoletes 1717 Prop/Ele    PPP Multilink Protocol (MP)         *
1989 obsoletes 1333 Prop/Ele    PPP Link Quality Monitoring         *
1908 obsoletes 1452 Prop/Elec   Coexistence between SNMPv1 & SNMPv2
1907 obsoletes 1450 Prop/Elec   MIB for SNMPv2
1906 obsoletes 1449 Prop/Elec   Transport Mappings for SNMPv2
1905 obsoletes 1448 Prop/Elec   Protocol Operations for SNMPv2
1904 obsoletes 1444 Prop/Elec   Conformance Statements for SNMPv2
1903 obsoletes 1443 Prop/Elec   Textual Conventions for SNMPv2
1902 obsoletes 1442 Prop/Elec   SMI for SNMPv2
1773 obsoletes 1656 Prop/Elec   BGP-4 Protocol Document
1666 obsoletes 1665 Prop/Ele    SNANAU MIB
1573 obsoletes 1229 Prop/Elec   Ext. to the Generic-Interface MIB
1542 obsoletes 1532 Prop/Elec   Extensions for Bootstrap Protocol
2030 obsoletes 1769 Info/       Simple Network Time Protocol       *
1795 obsoletes 1434 Info/       Data Link Switching                *
1320 obsoletes 1186 Info/       The MD4 Message Digest Algorithm
1592 obsoletes 1228 Expe/Limi   SNMP Distributed Protocol Interface
1528 obsoletes 1486 Expe/Lim    An Experiment in Remote Printing   *





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RFC 2000                   Internet Standards              February 1997


Thanks to Lynn Wheeler for compiling the information in this
subsection.

[Note: an asterisk at the end of a line indicates a change from the
previous edition of this document.]

7.  Contacts

7.1.  IAB, IETF, and IRTF Contacts

   7.1.1.  Internet Architecture Board (IAB) Contact

   Please send your comments about this list of protocols and especially
   about the Draft Standard Protocols to the Internet Architecture Board
   care of Abel Winerib, IAB Executive Director.

      Contacts:

         Abel Winerib
         Executive Director of the IAB
         Intel, JF2-64
         2111 NE 25th Avenue
         Hillsboro, OR 97124

         1-503-696-8972

         AWeinrib@ibeam.jf.intel.com


         Brian E. Carpenter
         Chair of the IAB
         IBM United Kingdon Laboratories
         Hursley Park
         Winchester
         Hampshire SO21 2JN

         +44 1962 816833

         brian@hursley.ibm.com












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RFC 2000                   Internet Standards              February 1997


   7.1.2.  Internet Engineering Task Force (IETF) Contact

      Contacts:

         Fred Baker
         Chair of the IETF
         cisco Systems, Inc.
         519 Lado Drive
         Santa Barbara, CA 93111

         1-805-681-0115

         fred@cisco.com

         Steve Coya
         IESG Secretary
         Corporation for National Research Initiatives
         1895 Preston White Drive, Suite 100
         Reston, VA 22091

         1-703-620-8990

         scoya@IETF.ORG

         Steve Coya
         Executive Director of the IETF
         Corporation for National Research Initiatives
         1895 Preston White Drive, Suite 100
         Reston, VA 22091

         1-703-620-8990

         scoya@IETF.ORG


















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RFC 2000                   Internet Standards              February 1997


   7.1.3.  Internet Research Task Force (IRTF) Contact

      Contact:

         Abel Winerib
         Chair of the IRTF
         Intel, JF2-64
         2111 NE 25th Avenue
         Hillsboro, OR 97124

         1-503-696-8972

         AWeinrib@ibeam.jf.intel.com


7.2.  Internet Assigned Numbers Authority Contact

      Contact:

         Joyce K. Reynolds
         Internet Assigned Numbers Authority
         USC/Information Sciences Institute
         4676 Admiralty Way
         Marina del Rey, CA  90292-6695

         1-310-822-1511

         IANA@IANA.ORG

   The protocol standards are managed by the Internet Assigned Numbers
   Authority.

   Please refer to the document "Assigned Numbers" (RFC-1700) for
   further information about the status of protocol documents.  There
   are two documents that summarize the requirements for host and
   gateways in the Internet, "Host Requirements" (RFC-1122 and RFC-1123)
   and "Requirements for IP Version 4 Routers" (RFC-1812).

      How to obtain the most recent edition of this "Internet Official
      Protocol Standards" memo:

         The file "in-notes/std/std1.txt" may be copied via FTP from the
         FTP.ISI.EDU computer using the FTP username "anonymous" and FTP
         password "guest".







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RFC 2000                   Internet Standards              February 1997


7.3.  Request for Comments Editor Contact

      Contact:

         Jon Postel
         RFC Editor
         USC/Information Sciences Institute
         4676 Admiralty Way
         Marina del Rey, CA  90292-6695

         1-310-822-1511

         RFC-Editor@ISI.EDU

   Documents may be submitted via electronic mail to the RFC Editor for
   consideration for publication as RFC.  If you are not familiar with
   the format or style requirements please request the "Instructions for
   RFC Authors".  In general, the style of any recent RFC may be used as
   a guide.

7.4.  The Network Information Center and
      Requests for Comments Distribution Contact

      RFC's may be obtained from DS.INTERNIC.NET via FTP, WAIS, and
      electronic mail.  Through FTP, RFC's are stored as rfc/rfcnnnn.txt
      or rfc/rfcnnnn.ps where 'nnnn' is the RFC number.  Login as
      "anonymous" and provide your e-mail address as the password.
      Through WAIS, you may use either your local WAIS client or telnet
      to DS.INTERNIC.NET and login as "wais" (no password required) to
      access a WAIS client.  Help information and a tutorial for using
      WAIS are available online.  The WAIS database to search is "rfcs".

      Directory and Database Services also provides a mail server
      interface.  Send a mail message to mailserv@ds.internic.net and
      include any of the following commands in the message body:

         document-by-name rfcnnnn      where 'nnnn' is the RFC number
                                       The text version is sent.

         file /ftp/rfc/rfcnnnn.yyy     where 'nnnn' is the RFC number.
                                       and 'yyy' is 'txt' or 'ps'.

         help                          to get information on how to use
                                       the mailserver.

      The InterNIC directory and database services collection of
      resource listings, internet documents such as RFCs, FYIs, STDs,
      and Internet Drafts, and publicly accessible databases are also



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      now available via Gopher.  All our collections are WAIS indexed
      and can be searched from the Gopher menu.

      To access the InterNIC Gopher Servers, please connect to
      "internic.net" port 70.

      Contact: admin@ds.internic.net

7.5.  Sources for Requests for Comments

   Details on many sources of RFCs via FTP or EMAIL may be obtained by
   sending an EMAIL message to "rfc-info@ISI.EDU" with the message body
   "help: ways_to_get_rfcs".  For example:

           To: rfc-info@ISI.EDU
           Subject: getting rfcs

           help: ways_to_get_rfcs

8.  Security Considerations

   Security issues are not addressed in this memo.

9.  Author's Address

   Jon Postel
   USC/Information Sciences Institute
   4676 Admiralty Way
   Marina del Rey, CA 90292

   Phone: 310-822-1511
   Fax:   310-823-6714

   Email: Postel@ISI.EDU

















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