Path: utzoo!attcan!uunet!husc6!bloom-beacon!apple!bionet!agate!ucbvax!A.ISI.EDU!CERF
From: CERF@A.ISI.EDU
Newsgroups: comp.protocols.tcp-ip
Subject: Re: simultaneous connections
Message-ID: <[A.ISI.EDU]13-Oct-88.01:57:40.CERF>
Date: 13 Oct 88 05:57:00 GMT
References: <8810121958.AA06328@tove.umd.edu>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 10

In systems which operate a distributed, common algorithm which does
not use the master/slave or caller/callee model, the TCP was specifically
designed to allow to processes to reach each other concurrently and
wind up with a single connection. The ISO model tends to be master/slave.

I do not know whether any distributed systems in the Internet take 
advantage of the TCP design feature but at the time of its design,
TCP held symmetry to be a highly valuable characteristic.

Vint Cerf