Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!aurora!labrea!agate!ucbvax!UC.MSC.UMN.EDU!slevy
From: slevy@UC.MSC.UMN.EDU (Stuart Levy)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: PSN 7 End-to-End question.
Message-ID: <8802042155.AA00768@uc.msc.umn.edu>
Date: 4 Feb 88 21:55:10 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 4

I did try running two TCP connections to our own interface as well as one.
If round trip time is the limiting factor, then two TCPs should give 
better total throughput.  But (in the one case I tried, sending 50K bytes
to our own net-10 address at 3 AM local time) the total rate actually
decreased -- ~ 31 kilobits/s on one connection, ~ 12 kb/s for each of two.