Full Duplex Ethernet Links
Full duplex operation means that devices at each end of a full duplex link can send and receive data simultaneously.
This means, theoretically, that Full Duplex has twice the bandwidth of normal (half duplex) Ethernet.
Since there are only two devices on a full duplex link, there is no shared channel and no collisions.
CSMA/CD protocol
prevents this
Half Duplex
DTE | R | DTE |
Full Duplex
DTE | S | DTE |
DTE 
DTE 
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