SECTION I

Q-l (A)                                                       [4]

Write a Java routine for a server that can handle one client it a time. The server should read the data from the client and append the string "FROM SERVER:" at the beginning of the data that it reads and then sends the resulting string bade to the client. Your server should listen on port number 2222.

OR

Q-1 (A)                                                        [4]

Write a Java routine for a client that connects to a server called "MY SERVER" on port number 9000 and sends a request to get the server time. The Request should be the string "PLEASE INFORM ME THE TIME". On receiving the information the client should display the time on the standard output

Q-1 (B) Answer .the Questions to the point.                      [5]

1) List down all the methods of Applet skeleton?                                             [1]

2) List different types of sockets?                                                     [1]

 3) What is serialization and externalization of data?                    [2]

4) What is the difference between using a UDP socket and a TCP socket in Java?     [1]

Q-2 Answer the following questions                                [8]

A) Explain Sliding widow protocol?                              .         [5]

B) What are the problems associated with Acknowledgments and retransmission?   [3]

OR

Q-2 Answer the following questions                                [8]

A) Explain TCP state machine in detail.                                   [5]

B) What are pointer queries? Where are they most useful?                       [3]

Q-3 Answer the following question in brief                          [8]

  A) Explain Karn’s algorithm.[5]

  B) Explain Rlogin? What are the differences between Rlogin and Telent?[3]

OR

Q-3 Answer the following question in brief:[8]

A) Explain the process of Domain Name Resolution in detail.                  [5]

B) Explain How Telnet protocol works.                                    [3]

SECTION II

Q-4                                                      [9]

Write down a Java routing for server and client that for transferring a file from server to client. The server should listen on port 9999 and the client should request the server providing the name of the file to be transferred.

Q-5                                                    [8]

A) Differentiate ARP and RARP and their importance.[3]

B) Explain packet level filters and their variations?                             [5]

OR

Q-5                                                  [8]

A) Explain FIT Process model?                                          [5]

B) What is RPC? Why is it used?                                           [3]

Q-6 [8]                                                    

A) Explain Mail forwarding and aliases?                                  [5]

B) List down the sequence of command that are involved in a successful mail transfer using SMTP?   [3]                                                           

OR

Q- 6                                                       [8]

A) What is silly window syndrome and what are the potential solutions to it.[5]

B) What are the properties of reliable delivery systems?                         [2]

 C) What are the advantages of using a variable window size rather than static one?[1]