GATE CS 2012 — Question 52

Consider a source computer \(S\) transmitting a file of size \(10^{6}\) bits to a destination computer \(D\) over a network of two routers \(R_1\) and \(R_2\) and three links \(L_1, L_2, L_3\). \(L_1\) connects \(S\) to \(R_1\); \(L_2\) connects \(R_1\) to \(R_2\); and \(L_3\) connects \(R_2\) to \(D\). Let each link be of length 100 km. Assume signals travel over each link at a speed of \(10^{8}\) meters per second. Assume that the link bandwidth on each link is 1 Mbps. Let the file be broken down into 1000 packets each of size 1000 bits. Find the total sum of transmission and propagation delays in transmitting the file from \(S\) to \(D\).