From owner-freebsd-hackers  Thu Oct  9 07:40:31 1997
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To: Dave Marquardt <marquard@zilker.net>
cc: freebsd-hackers@FreeBSD.ORG
Subject: Re: TCP problem 
In-reply-to: Your message of "09 Oct 1997 08:02:41 CDT."
             <854t6r6qdq.fsf@localhost.zilker.net> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Thu, 09 Oct 1997 07:41:54 -0700
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>>    Actually, only about 1/3rd of RFC 1323 deals with extending the window
>> size. The other 2/3rds deal with other extensions to improve performance
>> (selective ACK and better round-trip time measurement). ...but this hardly
>> matters of course.
>
>Selective ACK?  I thought that didn't come out until recently....

   Oops, yes, the other third was the "PAWS" - Protection Against Wrapped
Sequence numbers. SACK was originally defined in RFC 1072, but later redefined
in RFC 2018.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project