1. If the collision happens again at the 3^rd try (k=2), What is the probability of collision at the 3rd try? Show the details of your calculation.

Backoff Example 1st collision R random number: 0 or 1 Backoff-time R slot-time 2rd collision agai K = K+1 = 2 P 2k-1 3 R random: 0, 1, 2, 3 Backoff-time R x slot-time V K is a control parameter to define a random number range (0, 2Ak - 1) P is the maximal number in the random number range. P 2Ak-1 R is the actual random number chosen by a station