Q2. (a) Two towns 20km apart are connected by a microwave data link. Data is sent across the link in 800 byte frames and the link operates at a data rate of 120Mbps. Assuming the link has a bit error rate of 4 x 10-5, and a velocity of propagation v-3 x 10% m/s, determine the link utilisation efficiency using the following protocols: 6 Marks] 13 marks] (i) Idle RQ (ii) Selective
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