i am learning the basics.......!

Tuesday, May 06, 2008

Full duplex Ethernet - without CS, MA and CD

Always we used to ask in interviews.. what is the media access protocol in ethernet ? - we always needed the answer CSMA/CD ... CSMA/CD was and is ethernet...

But in full duplex ethernet ???

In full duplex ethernet there is no multiple access... Rx of Host is connected directly to Tx of Switch and vice versa... No multiple access ( no MA).

So no need for career sensing ( no CS )

No chances of collision... so loopback connection also not needed ( no CD)

So full duplex ethernet is half duplex ethernet without CSMA/CD... Only the frame formats and related stuff is retained.. and full duplex ethernet does not add anything more to the protocol. It just makes it simple...

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