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D. The exponential back off mechanism reduces the probability of collision on
retransmissions
In an Ethernet local area network, the true statement is that devices compete for access to the network using a method called Carrier Sense Multiple Access with Collision Detection (CSMA/CD). This method allows multiple devices to check the cable for traffic and transmit when they believe the line is clear. If two devices transmit at the same time, a collision occurs, and each device must wait a random amount of time before attempting to transmit again.