Alice and Bob are 4 hops apart on a datagram packet-switched network where each link is 100 mile long. Per-hop processing delay is 5?s. Packets are 1500 bytes long. All links have a transmission speed of 56kbit/s.The speed of light in the wire is approximately 125,000 miles/s. If Bob sends a 10-packet message to Alice, how long will it take Alice to receive the message up to the last bit (measured from the time Bob starts sending)?

What is the dominated delay in this connection? Can you improve the delay (reduce)? Why, why not?