Question 3. Solve the following problem:

Consider the figure below, with three links, each with the specified transmission rate and link length. Find the end-to-end delay (including the transmission delays and propagation delays on each of the three links, but ignoring queuing delays and processing delays) from when the left host begins transmitting the first bit of a packet to the time when the last bit of that packet is received at the server at the right. The speed of light propagation delay on each link is 2.5x10⁸ m/sec. Assume a packet length of 6000 bits. Give your answer in milliseconds.

Link 1: Transmission rate = 50 Mbps; Link length = 5 km;

Link 2: Transmission rate = 300 Mbps; Link length = 18000 km;

Link 3: Transmission rate = 30 Mbps; Link length = 900 m;

Answer:

Link 1 -Link 2 - + Link 3