Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!rutgers!ames!sdcsvax!ucbvax!CCV.BBN.COM!hinden
From: hinden@CCV.BBN.COM (Robert Hinden)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: IP Datagram sizes
Message-ID: <8706011544.AA15202@ucbvax.Berkeley.EDU>
Date: Mon, 1-Jun-87 11:45:07 EDT
Article-I.D.: ucbvax.8706011544.AA15202
Posted: Mon Jun  1 11:45:07 1987
Date-Received: Wed, 3-Jun-87 01:00:05 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The ARPA Internet
Lines: 18

Nick,

In fact most of the networks that make up the Internet have MTU's smaller
than 1500 bytes.  Here is a summary:
     
     Wideband     2048
     Pronet Ring  2040
     Ethernet     1500
     Arpanet      1007
     NSFNET        576
     PDN           512
     Suran         320
     Satnet        256
     Packet Radio  226

Hope this helps.

Bob