[CLUE-Tech] Network DD

Carl Gibbons cgibbons at du.edu
Mon May 6 07:27:17 MDT 2002


> But you don't necessarily want one data byte per TCP packet - then your TCP
> overhead would outweigh your data.

Is it easy to measure ethernet frame overhead as well as TCP packet
overhead?  I think it might be a useful experiment to cook up
packets (layerr 3) such that when they're turned into ethernet
frames (layer 2) and ulimately end up on the wire (layer 1), you may
get accurate measurements of bits per frame and frames per second,
and multiply to get an empirical bits per second measurement that
you can compare to the advertized network speed.

If I remember correctly, and I don't, there's a fixed layer 2
overhead of 16 bytes per ethernet frame, or 18 bytes, or something
like that.




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