Exterior Gateway Protocol

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This article is about the specific protocol used on the early Internet. For routing protocols used to interconnect network systems, see Exterior gateway protocol.

The Exterior Gateway Protocol (EGP) is a now obsolete routing protocol for the Internet originally specified in 1982 by Eric C. Rosen of Bolt, Beranek and Newman,[1] and David L. Mills.[2]

Information

EGP was developed by Bolt, Beranek and Newman in the early 1980s. It was first described in RFC 827 and formally specified in RFC 904 (1984).[3] EGP is a simple reachability protocol, and, unlike modern distance-vector and path-vector protocols, it is limited to tree-like topologies.

During the early days of the Internet, EGP version 3 (EGP3) was used to interconnect autonomous systems. Currently, BGP version 4 is the accepted standard for Internet routing and has essentially replaced the more limited EGP3.[citation needed]

References

  1. ↑ RFC 827
  2. ↑ RFC 904
  3. ↑ TCP/IP Exterior Gateway Protocol (EGP) EGP Overview by The TCP/IP Guide

See also


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