Van Jacobson TCP/IP Header Compression: Difference between revisions

Revision as of 19:01, 22 March 2021

Revision as of 18:08, 17 April 2021

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'''Van Jacobson TCP/IP Header Compression''' is a [[data compression]] protocol described in '''RFC{{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 3-4 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 dialup 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).

==External links==

* RFC{{IETF RFC|1144}}

* [ftp://ftp.rfc-editor.org/in-notes/rfc1144.pdf RFC 1144] in an easier-to-read [[PDF]] format