A frame of size 5 x 106 bits enters a network at router A and exits at Router B.

Question

A frame of size 5 x 106 bits enters a network at router A and exits at Router B. There are eleven routers in the path across the network, including router A and router B. The distance between a pair of routers is 200 km. It takes a router 2 µsec to queue the frame and 1 µ to process it. The link connecting a pair of routers has a bandwidth of 5 Mbps. Assuming the speed of light inside a link is 2 x 108 m, compute the total delay (latency) experienced by the frame traversing the network from router A to router B. Which component of the total delay is dominant? Which component is negligible?

Explanation / Answer

3 Msec * 11 routers = 33Msec delay

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