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I have been reading at quite a few places about TCPIP v3 being out ...

I wanted to know what is this TCPIPv3 and what are differences between 2 and 3. I tried to google out the answer but could not get anything solid.

Thanks for your time.

-Nikmi

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migrated from stackoverflow.com Sep 10 '09 at 20:09

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Does TCP/IP have version numbers? It's a set of protocols. TCP probably does (though I know nothing about them), and IP has v4 and v6, but a version number for the group makes no sense to me at all. –  Samir Talwar Sep 10 '09 at 18:31
    
This doesn't seem to be programming related. –  ssg Sep 10 '09 at 18:36
2  
Where did you see this, specifically ? It sounds more like the version of a particular TCP/IP stack, or the reveision of a TCP/IP book. –  nos Sep 10 '09 at 19:11

3 Answers 3

Do you maybe mean:

Because I doubt you are talking about IPv3. According to Wikipedia:

Version numbers 0 through 3 were development versions of IPv4 used between 1977 and 1979.

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TCP/IP Illustrated Volume 3, maybe? –  Gerald Combs Sep 10 '09 at 20:37
    
RFC 793 defines the TCP; there does not seem to be a TCP version number separate from the IP version number (of which, as others state, IPv4 and IPv6 are the only ones you're likely to encounter). –  Jonathan Leffler Sep 11 '09 at 5:09

Could it refer to a specific vendor's TCP/IP stack version?

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I'd second Gerald Combs' answer -- This is most likely Richard Stevens' TCP/IP Illustrated, Volume 3

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