> Hi, Can someone please help me understand full-duplex and half-duplex.
> I understand that you may use ndd to set a ethernet interfac to 10/100M
> full/half duplex. What I don't understand is how you can achieve
> Since ethernet is based on CSMA/CD, if the ethernet card send and receive
> a packet at the same time, doesn't it collide?
Full-duplex is only supported on networks where collision detection can
be disabled. You can't do that with the traditional coax cables or
hardware ethenet hubs.
However switches connected with twisted pair are capable of it because
the packet from each side is sent over independent media, and no other
equipment will see the signals.
In such a configuration, true collisions are impossible and CD (along
with the standard avoidance algorithms) can be disabled.
Quote:> If full-duplex is achieved, can someone explain the physics behind the
> scene, like what voltage is used for sending out packets and what voltage
> is used for receiving packets.
Same voltage, different wires.
Senior Technical Consultant TAOS http://www.taos.com/
Got some Dr Pepper? San Francisco, CA bay area
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