Question

If there are N routers from source to destination, the total end to end delay in sending packet P(L-> number of bits in the packet R-> transmission rate) is equal to ______________

(a) N

(b) (N*L)/R

(c) (2N*L)/R

(d) L/R

The question was posed to me in an interview for job.

My question comes from Packet Switching & Circuit Switching topic in section Security & Physical Layer of Computer Network

Answer 1

Right answer is (b) (N*L)/R

The best explanation: The equation to find the end to end delay when no. of bits, transmission rate and no. of routers is given by (N*L)/R. The total end to end delay, that is, nodal delay is the sum of all, the processing delay, queuing delay, transmission delay and propagation delay.