Practice Sample Questions (chp3)

1) Four Broad Class Services:

a) Reliable Data Transfer , only TCP

b) Throughput Delay, neither

c)Delay Guarantee, neither

d)Security, neither

3) S has a port# of 23.      Just choose and ephemeral/registered port # from 1024-49151.

Source Port #                         Destination Port #

a) A -> S  ,               2464                                                 23

b)B -> S  ,               17320                                                23

c)S -> A  ,               23                                                     2464

d)S -> B  ,               23                                                     17320

e)Yes, it is possible because different hosts can have  the same port numbers.

f)No, if they are the same host then they cannot have the same port number because if its the same host it means that they will have the same IP and thus cannot have the same port number will just be two conflicting host systems.