1. A pure ALOHA network transmits 200-bit frames on a shared channel of 200 kbps. What is the requirement to make this frame collision-free? a) 2msec b) 4msec c) 2sec d) 4sec AnswerAnswer: a [Reason:] Average frame transmission time Tfr = 200 bits/200 kbps or 1 ms Vulnerable time = 2x Tfr = 2 ×…