A 1 Mbps satellite link connects two ground stations. The altitude of the satellite is 6000 km and speed of the signal is 3 × 108 m/s. What should be the packet size for a channel utilization of 50% for a satellite link using goback63 sliding window protocol? Assume that the acknowledgment packets are negligible in size and that there are no errors during communication.
a. 81031 bytes
b. 83101 bytes
c. 801301 bytes
d. 81301 bytes
Ans given op(d) .....but i got 80bytes
plz someone clear me....