Question

3.

[End-to-end Delay] What is the formula for the end-to-end delay for P packets of length L over M links with rates  Ri = R for i=1,…,M ?

A. MPL/2

B. (M+P-1)*(L/R)

C. PR/NL

D. MLR

Answer 1

SOL:

3) The end-to-end delay for P packets of length L over M links with rates  Ri = R for i=1,…,M is

(M+P-1)*(L/R)

Option B is correct answer

Explanation:

Given

Packet length = L

No of Packets = P

No of Links = M

Transmission Rate = R

Transmission delay = Packet length / Transmission Rate

= L/R

The details about remaining other delays are not given so we treat them as 0

So End to End delay to transmit "P" Packets = (No of Links)*(Transmission delay)+(No of Packets-)*(Transmission delay)

= M*(L/R)+(P-1)*(L/R)

= (M+P-1)*(L/R)