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Ethernet maintains an interval of time T over which is will randomize when it will attempt a retransmission. After each collision for the same packet, it doubles the length of T up to some fixed max. This is better than just a single, fixed value of T since when there are a lot of collisions the interval over which randomization is done will be large, allowing just one node to successfully being transmitting. When there are only a small number of colliding nodes, the retransmission will be randomized initially over a small T, allowing a node to transmit more quickly.

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