Path: utzoo!utgpu!water!watmath!clyde!cbosgd!ucbvax!PESCADERO.STANFORD.EDU!cheriton
From: cheriton@PESCADERO.STANFORD.EDU ("David Cheriton")
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  Pseudo-Headers & Checksumming
Message-ID: <8801110746.AA18699@Pescadero>
Date: 11 Jan 88 07:46:41 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The ARPA Internet
Lines: 7

VMTP has no need for pseudo headers a la TCP because the "entity identifiers",
the transport-level endpoints, are (inter)network level independent as is the
rest of the packet.  The data to be checksummed is contiguous as well.
Putting the checksum anywhere except at the very end of the packet seems
disasterous if you want to look good on a 100 megabit network.

David Cheriton