Question: Suppose there are N equal-bandwidth links on the path between A and B, as in the diagram below, and we wish to send M consecutive

Suppose there are N equal-bandwidth links on the path between A and B, as in the diagram below, and we wish to send M consecutive packets.

A S1 ... SN-1 B

Let BD be the bandwidth delay of a single packet on a single link, and let PD be the propagation delay on a single link. Show that the total bandwidth delay is (M+N-1)BD, and the total propagation delay is NPD. Hint: the total time is the sum of the time A takes to begin transmitting the last packet, and the time that last packet (or any other packet) takes to travel from A to B. Note that no packets ever have to wait at any Si because the ith packet takes exactly as long to arrive as the (i-1)th packet takes to depart.

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