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DragonFly users List (threaded) for 2006-10
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Re: Network Slowdowns?

From: "Justin C. Sherrill" <justin@xxxxxxxxxxxxxxxxxx>
Date: Wed, 11 Oct 2006 22:48:00 -0400 (EDT)

On Wed, October 11, 2006 6:43 pm, Matthew Dillon wrote:
>     Packet overhead for bulk data transfers is only around 3.4%.  The
>     ethernet MAC is 12 bytes.  The TCP/IP header is 40 bytes (20 bytes
>     for UDP/IP), plus additional bytes for options, and the data payload
>     is usually around 1448 bytes.

Just to throw another wrinkle in there, the overhead can change when you
change physical networks, which happens at least once as data travels into
the home.  The cable modem or DSL modem at home is a bridge or (more
likely) switch for analog<->digital, along with any wireless hookup from
there.   For a more exotic example, powerline communication eats up 12
bytes, if it's HomePlug standard.

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