CUSAT Computer Communication and Networks Exam Paper July 2009

CUSAT Computer Communication and Networks Exam Paper July 2009

B. Tech Degree VII Semester (Supplementary)Examination July 2009

EB/EI/EE 701 COMPUTER COMMUNICATION AND NETWORKS

(2002 Scheme)

Time : 3 Hours                                                                                                                                     Maximum Marks : 100

  1. (a) Explain various network topologies.                                                                                                             (12)
  2. (b) What is the need of layering approach in Computer Network?                                                                 (8)

OR

  1. (a) With the help of a diagram, explain ISO – OSI layers and their functions.                                           (14)
  2. (b) Discuss different internet services.                                                                                                                  (6)
  3. Differentiate between the following:

(i)                   Base band and broad band transmission                                                           (7)

(ii)                  Synchronous and asynchronous transmission                                                  (7)

(iii)                Full duplex and half duplex links                                                                         (6)

OR

  1. (a) Explain stop – and – wait sliding window protocol. (10) (b) Explain X – 21 digital interface. (10)
  2. (a) What is the need for congestion control? Explain any one congestion control algorithm. (12)
  3. (b) Write a short note on CSMA / CD.                                                                                                 (8)

OR

  1. (a) Explain any one routing algorithm.                                                                                                             (10) (b) Explain different IEEE 802 standards. (10)
  2. Write notes on ;

(i)                   Flow control and buffering

(ii)                  Multiplexing

(iii)                Crash recovery

(iv)               Activity management                                                                            (4×5 = 20)

OR

  1. (a) Explain the implementation of RPC with the help of a diagram.                                                          (1) (b) Explain client server model.                                                                                                                     (10)
  2. (a) Explain the functions of presentation layer.                                                                                              (10) (b) Explain different data compression techniques. (10)

OR

  1. Write short notes on :

(i)                   Virtual terminal

(ii)                  FTP

(iii)                Electronic mail

. (iv) Cryptography.                                                                                                    (4×5= 20)

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