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diff --git a/doc/rfc/rfc1149.txt b/doc/rfc/rfc1149.txt new file mode 100644 index 0000000..a981394 --- /dev/null +++ b/doc/rfc/rfc1149.txt @@ -0,0 +1,115 @@ + + + + + + +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 + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +Waitzman [Page 2] +
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