Ethernet Frame size

Archived from groups: comp.dcom.lans.ethernet (More info?)

My professor, in a exercice sheet, asked me why a Ethernet Size is at
least 64 bytes. I've already downloaded a lot of material about this
matter, but I can't find a reasonable explanation for that. I think the
problem is the Collision Detection protocol, but I'm not sure and I
can't prove it if he asks me. Could you help me please?

Bye

Sebastiano


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Archived from groups: comp.dcom.lans.ethernet (More info?)

Sebastiano <info@sebastianogazzola.it> wrote:
> My professor, in a exercice sheet, asked me why a Ethernet
> Size is at least 64 bytes. I've already downloaded a lot of
> material about this matter, but I can't find a reasonable
> explanation for that. I think the problem is the Collision
> Detection protocol, but I'm not sure and I can't prove it
> if he asks me. Could you help me please?

We don't do homework around here, but seeing as you've
made some effort, I'll give you some hints to explore further:

Yes, min size has to do with collision detection.

For many years, ethernet was on a long shared coax cable (now it
is more often star-wired). Two stations could start transmitting
at the same time, and it is important that all stations (especially
the two transmitters) could detect the collision.

Ciao,
-- Robert