Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!oliveb!apple!dyson
From: dyson@Apple.COM (Patrick Dyson)
Newsgroups: comp.protocols.appletalk
Subject: Re: Ethernet vs LocalTalk
Summary: AppleTalk 3.4Mbit TCP 3Mbit
Message-ID: <30125@apple.Apple.COM>
Date: 5 May 89 00:58:14 GMT
References: <29980@apple.Apple.COM> <278@suna.CMI.COM> <24837@ames.arc.nasa.gov>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 21
Followup-To:comp.protocols.appletalk
Distribution:comp.protocols.appletalk


 > Misc os-bashing stuff deleted

Appletalk gets about 3.4 mbit performance cpu-to-cpu over Ethernet using
generic mac software and the ATP protocol (guaranted delivery, 2k chunks).

TCP implementations that I have seen for the mac II get slightly slower    
performance, but present more of a stream. UDP would be fairer.

The gating factor in file copy and application launch over ethernet is really 
the fileserver and the fact that the resource manager reads in small chunks.
The mac can really keep up with the majority of network services out there. 
If it was trying hard, the mouse would start to jump and things would slow
down - and this is rarely seen.

A big advantage of ethernet is what was said before - you can have a hundred
people talking to twenty services and the network is loafing most of the time.

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The numbers and opinions expressed above are my own and do not reflect those
of my employer. Patrick Dyson.