Full duplex transmission requires a point to point connection between two
devices. This is achieved using a switch. Since the connection is between
two and only two devices at a time, this allows them to transmit and receive
at the same time. Thus a collision would never occur and CSMA/CD is
unnecessary.
JOE
CCNP, CCDP, and a few other things...
"Dan West" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Sorry to ask such a simple question--but the CCNA book
> is still unclear as to what's going on.
>
> Half-duplex ethernet uses CSMA/CD for arbitration on
> the link. Does full duplex use it as well for
> arbitration? The book makes it sound like if you are
> running full-duplex that the CSMA/CD is not necessary.
> It mentions half-duplex looping a duplicate frame onto
> the recieve wire from the transmit wire.
>
> Thanks.
>
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