Calculate the bandwidth × delay product for the following links. Use one-way delay, measured from first bit sent to first bit received.

(a) 10-Mbps Ethernet with a delay of 10 µs.

(b) 10-Mbps Ethernet with a single store-and-forward switch like that of Exercise 17(a), packet size 5000 bits, and 10 µs per link propagation delay.

(c) 1.5-Mbps T1 link, with a transcontinental one-way delay of 50 ms.

(d) 1.5-Mbps T1 link through a satellite in geosynchronous orbit, 35,900 km high. The only delay is speed-of-light propagation delay.

Exercise 17(a)

10-Mbps Ethernet with a single store-and-forward switch in the path and a packet size of 5000 bits. Assume that each link introduces a propagation delay of 10 µs and that the switch begins retransmitting immediately after it has finished receiving the packet.