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From: B.A.McCauley@bham.ac.uk
Newsgroups: comp.os.linux.networking,comp.os.ms-windows.networking.tcp-ip,comp.unix.bsd.freebsd.misc
Subject: Re: Internet service providing-which OS?
Date: 03 Aug 1995 13:56:24 GMT
Organization: The University of Birmingham, UK.
Lines: 22
Distribution: best
Message-ID: <B.A.MCCAULEY.95Aug3145624@wcl-l.bham.ac.uk>
References: <3ue5qa$ain@panix.com> <3upgga$oqo@usenet.interramp.com>
<3upmq7$11f@agate.berkeley.edu> <3urba1$cgl@blob.best.net>
<3us870$15o@agate.berkeley.edu>
NNTP-Posting-Host: wcl-l.bham.ac.uk
In-reply-to: jkh@violet.berkeley.edu's message of 23 Jul 1995 01:21:36 GMT
In article <3us870$15o@agate.berkeley.edu> jkh@violet.berkeley.edu (Jordan K. Hubbard) writes:
>In article <3urba1$cgl@blob.best.net>, Matt Dillon <dillon@best.com> wrote:
>> Gentlemen. If I remember correctly, ftp.cdrom.com is sitting on
>> a BARRNET T3 backbone and, on average, pulls about 6 MBytes / sec
>> in bandwidth. That's on the order of 4 T1 equivalences!
>
>It's on the T3 backbone, but is connected to same via a 10mb/sec ethernet
>connection which it pretty much maxes out. 1 T1 = 1.54 Mb, yes? So
>saying that 10Mb = 7 T1s is not that poor of an approximation.
Actually I think Ethernet = 2 T1s is a better approximation. I seem to
recall that with a random traffic profile CSMA/CD (ethernet) actually
saturates with an average traffic at 1/e (about 37%) of the burst
transfer rate. Beyond that, the collision retry queues just keep on
growing.
--
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