This Homework Is Due By 11:59 PM on September 22, 2013

  1. Given the following IP addresses (In Hexadecimal), identify (a) the Class, (b) the Network ID, (c) the Host ID of the following IP Addresses, and (d) write each address in dotted decimal notation:
    1. 7648BFDC
    2. D79CAB9D
    3. 9A7859E3
    4. C7694F3E
    5. 09427EFA
    6. 8A7D3C42
    7. 594DC3BE
    8. D1792EC3
    9. A6532FDC

  2. Exactly how many class A, B, and C networks can exist? Exactly how many hosts can a network in each class have? How many possible addresses are possible in each class? Be careful to allow for broadcast as well as class D and E addresses.

  3. How many IP addresses would be needed to assign a unique IP address to every house in the USA? The world? Is the IP address space sufficient? (Search the internet for reasonable numbers of households in the USA and the world).

  4. One common algorithm for managing the ARP cache replaces the least recently used entry when adding a new one. Under what circumstances can this algorithm produce unnecessary network traffic?

  5. Suppose machine C receives an ARP request sent from A looking for target B, and suppose C has the binding for IPB to HWB in its ARP cache. Should C answer the request? Explain.

Please submit the completed assignment on Blackboard as a Microsoft Word file or a PDF file. No other forms of submission will be accepted.