when we look at a switch it is busy. Suppose that if there is a cell being transmitted by a switch, the average delay spent waiting for a cell to finish transmission is one-half a cell transmission time. What is the average time from the input of the first switch to clearing the fifth?

d. However, the measure of most interest is not delay but jitter, which is the variability in the delay. Use parts

(b) and

(c) to calculate the maximum and average variability, respectively, in the delay.

In all cases assume that the various random events are independent of one another;

for example, we ignore the burstiness typical of such traffic.