This Homework Is Due By 11:59 PM on Friday November 11, 2016

  1. Explain sliding windows as used by TCP. What advantages does TCP's sliding windows have over traditional fixed sliding windows and simple Positive Acknowledgement with Retransmission (PAR) protocol?


  2. A lost TCP acknowledgement does not necessarily force retransmission. Explain why.

  3. Each router in the autonomous system shown below starts with a routing table showing the networks they are directly connected to. The routers exchange routing information using a distance vector protocol. Show the messages that are exchanged and the state of the routing tables after each message. Use the Routing Tables sheet PDF file or Word file.

    4. network

    Please submit the essay question(s) on Blackboard in Homework 7 (Essay Questions) as a typed Microsoft Word file or a PDF file. No other forms of submission will be accepted.



  4. Given that a frame is formatted as follows:

    Frame Header

    And given that an IP datagram is formatted as follows:

    IP Header

    And given that a TCP segment is formatted as follows:

    TCP Header

    And given the following frame with an encapsulated IP datagram and TCP segment:

    Homework 7 TCP Frame

    1. What fragmentation flags are set?
    2. What is the fragment offset?
    3. What is the TTL count?
    4. What is the TCP source port?
    5. What is the TCP destination port?
    6. What is the Sequence Number?
    7. What is the Acknowledgment Number?
    8. What flags are set?
    9. What is the Window Size?
    10. What is the checksum?
    11. What is the urgent pointer?
    12. If the TCP header and the IP header include no options or padding, what are the first five bytes of the TCP segment data?

    5. Please submit the numerical question(s) on Blackboard in Homework 7 (Numerical Questions) No other forms of submission will be accepted.