A colony is set up on moon. The 10 Mbps link from the earth to the lunar colony measures about 242,000 miles. Assume that the signal propagation speed is 186,000 miles per second. Calculate the minimum round trip time for the link. Using RTT as the delay, calculate the delay x BW product for the link. If a camera on the lunar base sends 25 Mbyte image file to the earth as a sequence of 1 Kbyte packets, how many bits are needed for the sequence number if we assume the use of a sliding window protocol? Assume that the data packets are 2500 bits long and acknowledgments are piggybacked. The error probability is 7%. What is the maximum achievable efficiency in the following cases? Stop and wait protocol with processing delay of 0.1 ms at both sender and receiver ends. SRP with window size 8 and negligible processing delay. Go Back-n with window size 64 and negligible processing delay.
