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From: case%utkvx4.DECNET@UTKCS2.CS.UTK.EDU (J. D. CASE)
Newsgroups: comp.protocols.tcp-ip
Subject: history and philosophy
Message-ID: <8710291552.AA01185@utkcs2.CS.UTK.EDU>
Date: Thu, 29-Oct-87 10:52:23 EST
Article-I.D.: utkcs2.8710291552.AA01185
Posted: Thu Oct 29 10:52:23 1987
Date-Received: Tue, 3-Nov-87 03:35:18 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
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I am teaching a course on the TCP/IP protocol suite and internetworking.  We 
are using the RFC's as a text and sources for "workbook".  While going through
some RFC's, a question has come up that I desire help in answering.

My students would like to know what the thinking was behind including the
pseudo-header into the TCP checksum algorithm RFC 793 pp 16,17 and into the
UDP checksum algorithm RFC 768 p 2. 

Do any of you old crusty souls who were present in the discussions leading to
those documents remember some of the thinking that led to those decsions? 

Help appreciated in advance.

Jeff Case
case@utkcs2.cs.utk.edu