Date: Sat, 20 Jun 1998 12:20:14 +0100 From: Brian Somers <brian@Awfulhak.org> To: bmah@CA.Sandia.GOV Cc: Open Systems Networking <opsys@mail.webspan.net>, spork <spork@super-g.com>, Joel Ray Holveck <joelh@gnu.org>, root@bmccane.maxbaud.net, hackers@FreeBSD.ORG Subject: Re: TweakDUN Message-ID: <199806201120.MAA01601@awfulhak.org> In-Reply-To: Your message of "Sat, 20 Jun 1998 00:20:11 PDT." <199806200720.AAA24228@stennis.ca.sandia.gov>
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> Ummm. Let me offer my corrections to this. According to some hurried math, a
> 1500 byte packet takes about 520 ms to send via a 28.8Kbps link (assuming 10
> bits per byte due to stop/start bits, but not counting link-level framing). A
> 576-byte packet is going to take about 200 ms.
>
> Where you *do* lose is the fact that for each of those packets, you have 40
> bytes of headers (20 IP + 20 TCP) that you can't lose for data. So you can
> use 1460/1500 = 97% of the bytes in a packet for "real data", or 536/576 = 93%
> of the bytes. (Again, discounting link-level framing overheads.)
[.....]
And turning on VJ compression just about negates this overhead.
> Bruce.
--
Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <brian@OpenBSD.org>
<http://www.Awfulhak.org>;
Don't _EVER_ lose your sense of humour....
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