I understand it will depend on the speed of the ethernet 10 Mbit to 100 Gbit. Given an ethernet speed, how do I calculate the time spend in the wire from NIC-to-NIC? I am assuming here that the machines are in the same room, not across the country of course.
closed as not constructive by SvW, Dave M, Greg Askew, ewwhite, mdpc Feb 2 '13 at 2:04
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It doesn't matter if the distance is 10m or 3000km, the calculation is the same, as long as it's just a wire and no active components are involved.
A napkin type calculation, assuming speed of light: c = 300,000,000 m/s and lots of idealizations:
so, with a wire length of 10 m and 1 Gbps ethernet, you end up with:
or roughly 10 μs.