Path: utzoo!mnetor!uunet!husc6!bbn!uwmcsd1!ig!agate!ucbvax!A.ISI.EDU!CERF
From: CERF@A.ISI.EDU
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  PSN 7 End-to-End question.
Message-ID: <[A.ISI.EDU].5-Feb-88.17:04:07.CERF>
Date: 5 Feb 88 22:04:00 GMT
References: <12371804390.20.LYNCH@A.ISI.EDU>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 14

Dan,

Bob Kahn and I got about 42 kb/s on stress tests of the ARPANET
in its early stages. In later years, there was more code in the
IMP and it slowed down some. But then came end/end protocols like
TCP and, depending on the delay, I seem to recall we managed ony
about 35 kb/s through a single IMP, less if many hops were involved.

As to Lenny Kleinrock's 37%, that is 1/e and is the kind of result
you get with multi-access links - and even then, that number did not
guarantee stability (the packet satellite protocols demonstrated
that when running ALOHA style).

Vint