Suppose a company uses satellites to provide Internet access. The satellite is located at 750km above Earth (assume this is the direct distance between the equipment and the satellite). Packets are transmitted from the sender (equipment) to the receiver (equipment) via the satellite as illustrated by the figure above. Suppose the average packet size is 1250 bytes and link bandwidth (between the sender/receiver equipment and the satellite) is 100 Mbps.

a. Calculate the propagation delay for a packet from the sender to receiver, given the propagation speed is 3 108 m/s. 1 of 3 EECS 325 Computer Networks I Spring 2020 Assignment 1 b. If the sender could not send another packet until it receives an acknowledgement message from the receiver, then what would be the average throughput of this communication channel? (You can also represent this as a fraction of the link capacity. The length of the acknowledgement packet could be ignored.)

c. Based on question b, how large each packet should be to fully utilize the link capacity (In other words, the average throughput could reach 100 Mbps)?