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QA 1Mbps satellite link connects two ground stations. The altitude of the satellite is 36,504 km and speed of the
signal is 3 x 108 m/s. What should be the packet size for a channel utilization of 25% for a satellite link using go-back-
127 sliding window protocol? Assume that the acknowledgment packets are negligible in size and that there are no
errors during communication. (Gate-2008) (2 Marks)
(A) 120 bytes
(B) 60 bytes
(C) 240 bytes
(D) 90 bytes


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