Question: Suppose that the virtual circuit in Problem I goes through a terrestrial link in addition to the satellite link. The transmission time on the terrestrial link is 20 msec, and the processing and propagation delay is negligible. What is the maximum transmission rate in packets/sec that can be attained for this virtual circuit assuming no flow control? Find a lower bound to an end-to-end window size that will allow maximum transmission rate assuming no other traffic on the links. Does it make a difference whether the terrestrial link is before or after the satellite link?

Problem I: Consider a window flow controlled virtual circuit going over a satellite link. All packets have a transmission time of 5 msec. The round-trip processing and propagation delay is 0.5 sec. Find a lower bound on the window size for the virtual circuit to be able to achieve maximum speed transmission when there is no other traffic on the link.