J. Blustein

Network Computing

Assignment 1

Dates

Assigned

16 May

Due

26 May

Description

1. Answer the following four problems from Kurose & Ross (second edition) Chapter 1:
   1. Problem #2,
   2. Problem #3,
   3. Problem #5,
   4. Problem #9 and

2. Consider the frosting-and-conveyor-belt analogy for a sender, a single link, and a receiver, as introduced in class today. Suppose that the sender outputs 3 bits per second, and that the conveyor belt is 4 meters long and moves at 10 cm/sec. Suppose that packets are 40 bits long.

   1. What is the propagation delay for this link?
   2. What is the transmission delay for one packet?
   3. How long will it take from the time the first bit is sent until the last bit arrives at the destination?
   4. What is the physical length of a bit on the conveyor belt?

   5. Add a router and a second link identical to the first, so that there are two 4-meter conveyor belts in succession. Suppose that there is a processing delay of 8 seconds to begin retransmitting a packet at the router.

      Calculate how long it would take to transfer a file consisting of 15 packets across the two links.