This is correct. You don't use full duplex if you are competing for
bandwidth, ie, plugged into a hub. But if you are plugged into a switch,
there is only one bandwidth domain between the device and switch and
with nothing competing for the bandwidth on that link so you can go full
duplex.
andy
On Tue, 26 Dec 2000, John lay wrote:
> Priscilla, everybody,
>
> I am confused. Ethernet and FastEthernet uses the CSMA/CD as a channel
> allocation techinque in a shared media access envoiroment.
> Here it comes the confusion, when you are saying that the Full-duplex does
> not support CSMA/CD because the transmit and receive are on different wires.
> This implies that in this case there is no shared media, how come if you
> have two clients competing to talk to the same server simultaneously....!!
>
> Thanx
>
>
> On Mon, 25 Dec 2000 16:36:11 -0800, Priscilla Oppenheimer wrote:
>
> > It's true for Ethernet because Ethernet's CSMA/CD media access control
> > method has strict timing requirements, which result in strict length
> > restrictions. Half-duplex uses CSMA/CD. Full-duplex does not.
> >
> > I wouldn't say it's true in general, however.
> >
> > Priscilla
> >
> > At 05:32 PM 12/25/00, Li Song wrote:
> > >"full-duplex can be used over longer distance than
> > >half-duplex" ??
> > >what 's your opinion ??
> > >
> > >
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>
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