Hi, On Sun, Jul 31, 2011 at 06:53:14PM +0300, Martin T wrote: > I know that in case of full-duplex link there should be no collisions. > What I meant was that why shouldn't "late collision" occur in > half-duplex network if it works properly? Collisions are normal > behaviour of half-duplex links, but not "late-collisions". Is it > because in time it takes Tx in one end to send 512b of data to a wire, > the Rx of the other end should have already received the first bits of > the frame(if the cable length is in standards etc) and doesn't try to > transmit anything until the frame is completely received?
Correct - normally you would have "normal collisions", which is how
half-duplex arbitrates media access. A "late collision" is a sign for
a too-wide network diameter, or half/full-duplex mismatch.
gert
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