Good Question Jon. Full Duplex Ethernet cannot be performed except for on
an Ethernet Switch (AKA big multiport bridge, or a simple bridge) or on a
back to back connection between 2 machines. So, as you can see, there can
NEVER be more than 2 stations on the same physical "topological" segment for
full duplex, therefore it is not a shared media from a "Collision" since,
but it is the same media from a "Broadcast" since. I'm sure Priscilla can
put it in better words but that's the lowdown in mine:)
Shawn
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of John
lay
Sent: Tuesday, December 26, 2000 6:51 AM
To: Priscilla Oppenheimer; [EMAIL PROTECTED]
Subject: Confused (was Re: is this statement true ??)
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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