Assignment 3

Assigned: 11/5/09, Due: 11/12/09


  1. The IP packet header specifies the total length of the packet in bytes. However, the offset used for reassembling the fragmented packets is specified in units of 8-bytes. Why do you think that's the case? Hint: Look at the number of bits allocated to each of these fields in the IP header. (10 points)

  2. Chapter 4 problem 7 (10 points)

  3. Chapter 4 problem 45 (10 points)

  4. For the network below, show how the link-state algorithm builds the routing table for node D. (10 points)

  5. (10 points) For the network in the figure below, suppose the forwarding tables are established using the Distance Vector algorithm, and then the C-E link fails. Give
    1. The tables of A, B, D and F after C and E have reported the news.
    2. The tables of A and D after their next mutual exchange.
    3. The table of C after A exchanges with it.
    network