Computer Science 825
                         Quiz E           Name _______________________

1. In Socket level TCP/IP programming the selection of the UDP or TCP
   transport protocol is made in which of the following function calls:

   a. socket()                   b. bind()

   c. connect()                  d. listen()

2. For each of the following functions indicate S if the function is
   used in constructing a TCP/IP server such as the one we studied,
   C if it is used in the client, and B if it is used in both the
   client and server.

   ____ a. accept()

   ____ b. connect()

   ____ c. bind()

   ____ d. socket()

   ____ e. listen()

3. In the client / server model that we studied, the accept() function
   call returns:

   a. The same handle passed to    b. A handle to a different socket
      accept as a parameter.          that is bound to the same port
                                      as the original handle.

   c. A handle to a different
      socket that is bound to
      a different port from the
      original handle.

4. A significant disadvantage to the flow control method proposed
   by Belsnes is:

   a. It leads to excessive waits   b. Its use of unbounded window
      for pacing responses and         sizes can exacerbate congestion
      causes low throughput.           problems.

   c. It forces all connections to
      use the same window size
      regardless of the length of
      the connection.

5. When the senders and receivers have roughly equivalent power the
   transport window sizes should be:

   a. 1 packet                     b. Independent of the number of
                                      hops between specific senders
                                      and receivers.

   c. Larger for very distant      d. Smaller for very distant
      senders and receivers than      senders and receivers than
      for very close senders and      for very close senders and
      receivers.                      receivers.


6. Suppose a receiver in a stop and wait file transfer protocol uses
   an ack then write policy and the sender uses a policy of
   always retransmitting after a crash.  Identify whether each of
   the following sequence of events will result in correct behavior (OK)
   a lost packet (LOST) or a duplicate (DUP).

         AWC               AC(W)             C(AW)





7. The ISO's counterpart to the SNA "bracket" is the

   a. dialog                    b. activity

   c. synchonization point.     d. session level connect



6.