computer network homework 5

Answer these questions. Some questions just need short answers. Other questions need 1 or 2 paragraphs.

 Read each problem carefully. Failure to follow the instructions for a problem will result in a zero score for that problem.

Submit the completed Homework via Assignment in LEO.

1.    An IPv4 datagram has arrived with the following partial information in the header (in hexadecimal)

                        4500003C  00030000  1A06 . . . .

a.       What is the header size?

b.      Are there any options in the packet?

c.       What is the size of the data?

d.      How many more routers can the packet travel to?

e.       What is the protocol number of the payload being carried by the packet?

Note: See figure 4-6 and table 4.2

2.   Rewrite the following IP addresses using binary notation.

a.  120.5.11.99                        b. 12.24.201.32          

3.  Find the class of the following IP addresses

a.       99.34.54.12                       b.  160.68.4.2             

4.   The IP network is a virtual network and must rely on a link layer network to transport a frame. What elements support getting an IP frame over an Ethernet LAN.

5.    Given the following circuit diagram and the cost for each circuit.

a.       What is the least cost path for communications between points A and Z? 

b.      What path has the minimum amount of hops?

           - D - - - - E - - - - F -

         -           -             -

       -           -               -

     A - - - - - - G - - - - - - - - Z

     -                             -

        -                         -

         H - - - - - - - - I - -

           Link   Cost

           A - D - 2

           D - E - 5

           E - F - 2

           F - Z - 3

           A - G - 8

           E - G - 1

           G - Z - 7      

           A - H - 6

           H - I - 4

           I - Z - 1