Van Jacobson TCP/IP Header Compression: Difference between revisions

Revision as of 18:12, 17 April 2021

Revision as of 09:46, 5 November 2021

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{{unreferenced|date=March 2021}}

'''Van Jacobson TCP/IP Header Compression''' is a [[data compression]] protocol described in {{IETF RFC|1144}}, specifically designed by [[Van Jacobson]] to improve [[Internet protocol suite|TCP/IP]] performance over slow serial links. Van Jacobson compression reduces the normal 40 [[byte]] TCP/IP packet headers down to 3-43–4 bytes for the average case. It does this by saving the state of TCP connections at both ends of a link, and only sending the differences in the header fields that change. This makes a very big difference for interactive performance on low speed links, although it will not do anything about the processing delay inherent to most dialupdial-up modems.

Van Jacobson Header Compression (also VJ compression, or just Header Compression) is an option in most versions of [[Point-to-Point Protocol|PPP]]. Versions of [[Serial Line Internet Protocol]] (SLIP) with VJ compression are often called [[CSLIP]] (Compressed SLIP).