by Bob Metcalfe and David Boggs of the Xerox PaloAlto Research Center (PARC).
Ethernet uses both ring and bus topology.
Speed of data transfer
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* In older version it is......10Mb/s.
* In newer versions (fast ethernet) it is........ 100Mb/s to 1000Mb/s.
Transmission medium
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1. coaxial cable
2. special grades of twisted pair wiring
3. fiber optic cable.
Protocol used in ethernet
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Carrier Sense Multiple Access with Collision Detection (CSMA/CD).
There are two kinds of ethernet based on media access control protocol.
They are....
1. Half Duplex Ethernet
2. Full Duplex Ethernet
These two are discussed below.
Half Duplex Ethernet
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A transmission medium is half duplex means that medium allows trafic
in one side at a time. That is consider two transmission nodes in both side
and these are communicating with each other , the medium is half duplex.
Then the procedure is that one node sent data when the channel is idil,else
a collision will occur.
Full Duplex Ethernet
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Full-duplex mode allows two nodes to simultaneously exchange data over a point to point link that provides independent transmit and receive paths.
A full-duplex 100 Mb/s station provides 200 Mb/s of bandwidth.
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