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Suppose four active nodes, A, B, C, and D, are competing for access to a channel using slotted ALOHA. Assume each node has an innite

Suppose four active nodes, A, B, C, and D, are competing for access to a channel

using slotted ALOHA. Assume each node has an innite number of frames to send.

Each node attempts to transmit in each time slot with probability 0.1. The first slot

is numbered 1, the second slot is numbered 2, and so on.

a) What is the probability that node A succeeds for the first time in slot 6?

b) What is the probability that the first success occurs in slot 4?

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