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IP VERSION NUMBERS
In the Internet Protocol (IP) [RFC791] there is a field to identify
the version of the internetwork general protocol. This field is 4
bits in size.
Assigned Internet Version Numbers
Decimal Keyword Version References
------- ------- ------- ----------
0 Reserved [JBP]
1-3 Unassigned [JBP]
4 IP Internet Protocol [RFC791,JBP]
5 ST ST Datagram Mode [RFC1190,JWF]
6 SIP Simple Internet Protocol [RH6]
7 TP/IX TP/IX: The Next Internet [RXU]
8 PIP The P Internet Protocol [PXF]
9 TUBA TUBA [RXC]
10-14 Unassigned [JBP]
15 Reserved [JBP]
REFERENCES
[RFC791] Postel, J., ed., "Internet Protocol - DARPA Internet Program
Protocol Specification", STD 5, RFC 791, USC/Information
Sciences Institute, September 1981.
[RFC1190] Topolcic, C., Editor, "Experimental Internet Stream
Protocol, Version 2 (ST-II)", RFC 1190, CIP Working Group,
October 1990.
PEOPLE
[JPB] Jon Postel <postel@isi.edu>
[JWF] Jim Forgie <FORGIE@XN.LL.MIT.ED>
[RH6] Robert Hinden <Hinden@ENG.SUN.COM>
[RXU] Robert Ullmann <ariel@world.std.com>
[PXF] Paul Francis <francis@cactus.ntt.jp>
[RXC] Ross Callon <callon@wellfleet.com>
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