[8708] in Commercialization & Privatization of the Internet
Re: One-way Internet?..no, it's "Asymetric"
daemon@ATHENA.MIT.EDU (Petri Helenius)
Wed Dec 1 05:30:36 1993
Date: Wed, 1 Dec 1993 09:12:21 +0200
From: Petri Helenius <pete@eunet.fi>
To: emv@garnet.msen.com
Cc: com-priv@uu.psi.com
In-Reply-To: <m0p4eof-000EjQC@garnet.msen.com> (emv@garnet.msen.com)
> (Dick St Peters writes:)
> : If you are not pouring out data at computer speeds - aren't an
> : information *provider*, you don't need much bandwidth going out. The
> : great majority of computers on a network - most any network - slurp a
> : lot more data off the network than they put on it. For a computer on
> : the Internet, most of what goes out is TCP acks.
> You need enough bandwidth to be able to ack packets at maximum rates.
> We went through this calculation once before - I think Craig Partridge
> came up with the numbers - such that if you really have 10mb/sec
> ethernet going in one direction you only get to use a small part of
> it when the acks come back on a 14.4 modem. Using something like
> ISDN for the return channel makes a substantial difference in throughput.
If you do multicasting, you don't have to ack packets.
Pete
