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+Network Working Group D. Waitzman
+Request for Comments: 1149 BBN STC
+ 1 April 1990
+
+
+ A Standard for the Transmission of IP Datagrams on Avian Carriers
+
+Status of this Memo
+
+ This memo describes an experimental method for the encapsulation of
+ IP datagrams in avian carriers. This specification is primarily
+ useful in Metropolitan Area Networks. This is an experimental, not
+ recommended standard. Distribution of this memo is unlimited.
+
+Overview and Rational
+
+ Avian carriers can provide high delay, low throughput, and low
+ altitude service. The connection topology is limited to a single
+ point-to-point path for each carrier, used with standard carriers,
+ but many carriers can be used without significant interference with
+ each other, outside of early spring. This is because of the 3D ether
+ space available to the carriers, in contrast to the 1D ether used by
+ IEEE802.3. The carriers have an intrinsic collision avoidance
+ system, which increases availability. Unlike some network
+ technologies, such as packet radio, communication is not limited to
+ line-of-sight distance. Connection oriented service is available in
+ some cities, usually based upon a central hub topology.
+
+Frame Format
+
+ The IP datagram is printed, on a small scroll of paper, in
+ hexadecimal, with each octet separated by whitestuff and blackstuff.
+ The scroll of paper is wrapped around one leg of the avian carrier.
+ A band of duct tape is used to secure the datagram's edges. The
+ bandwidth is limited to the leg length. The MTU is variable, and
+ paradoxically, generally increases with increased carrier age. A
+ typical MTU is 256 milligrams. Some datagram padding may be needed.
+
+ Upon receipt, the duct tape is removed and the paper copy of the
+ datagram is optically scanned into a electronically transmittable
+ form.
+
+Discussion
+
+ Multiple types of service can be provided with a prioritized pecking
+ order. An additional property is built-in worm detection and
+ eradication. Because IP only guarantees best effort delivery, loss
+ of a carrier can be tolerated. With time, the carriers are self-
+
+
+
+Waitzman [Page 1]
+
+RFC 1149 IP Datagrams on Avian Carriers 1 April 1990
+
+
+ regenerating. While broadcasting is not specified, storms can cause
+ data loss. There is persistent delivery retry, until the carrier
+ drops. Audit trails are automatically generated, and can often be
+ found on logs and cable trays.
+
+Security Considerations
+
+ Security is not generally a problem in normal operation, but special
+ measures must be taken (such as data encryption) when avian carriers
+ are used in a tactical environment.
+
+Author's Address
+
+ David Waitzman
+ BBN Systems and Technologies Corporation
+ BBN Labs Division
+ 10 Moulton Street
+ Cambridge, MA 02238
+
+ Phone: (617) 873-4323
+
+ EMail: dwaitzman@BBN.COM
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+Waitzman [Page 2]
+ \ No newline at end of file