We do not consider the propagation delay in the last question since the range of WiFi is quite small. However, that is not true for satellite wireless communication. Consider a 100 kbps satellite channel with a 500 msec roundtrip delay. Suppose the size of each frame is 1000 bits.

1. (a) Computetheactualbandwidthofthischanneliftheonebitslidingwindowprotocolisused on this channel.

2. (b) Toimprovetheeficiencyofthebandwidthutilization,wemayincreasethewindowsizeto 40, i.e., the sender will transmit 40 frames before the arriving of the acknowledgement for the irst frame. Compute the capacity of the channel for this window size.

3. (c) What is the optimal windows size for the channel? Explain your answer.