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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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  • 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, 2009 at 18:31
  • This doesn't seem to be programming related.
    – ssg
    Sep 10, 2009 at 18:36
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    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, 2009 at 19:11

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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, 2009 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, 2009 at 5:09
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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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