Someone posting to comp.protocols.tcp-ip complained about a throughput of 122 kbps on a 256-kbps link with a 128-ms round-trip delay between the United States and Japan, and a throughput of 33 kbps when the link was routed over a satellite.

a. What is the utilization over the two links? Assume a 500-ms round-trip delay for the satellite link.

b. What does the window size appear to be for the two cases?

c. How big should the window size be for the satellite link?