OCTOBER / NOVEMBER 2000 COMPUTER NETWORKS (R)

MAHATMA GHANDHI UNIVERSITY (MG)

B.Teeh. DEGREE EXAMINATION,

OCTOBER / NOVEMBER 2000

COMPUTER NETWORKS (R)

(New Scheme - 1997 admissions)

Time: Three Hours                               Maximum 100 Marks

Part A

 Answer all questions.

1. Discuss the bus network topology.

2. Show the important layers of the ISO model in a block diagram.

3. Explain briefly the features of ISDN.

4. Discuss the important transmission media for digital data transfer.

5. Compare analog transmission with digital transmission.

6. Discuss pure ALOHA.

7. Discuss the use of MAC addresses.

8. Explain the features of UDP packets.

9. Discuss the features of transport layer in ISO0 model. arks)

10. What is -virtual terminal ?  (10 x 4 = 40 marks)

Part B

Answer all questions. All questions carry equal marks.

11. (a) Discuss the various network topologies with diagrams. Or

    (b) Explain the various physical media used for computer networking.

12. (a) Discuss the various routing algorithms and the hardware used for the same.    Or

    (b) Explain the problem of congestion and the methods used for overcoming these.

13. (a) Discuss the various ALOHA schemes. Or

    (b) Explain the LAN and AN features.

14. (a) Discuss, the packet switcWhing schemes currently used on the Internet          Or

    (b) Explain the implementation issues of the Physical layer protocol.

15. (a) Discuss the need of Cryptography in data communication. Or

    (b) Discuss the implementation of the electronic x 12 mail.

(5 x 12 = 60 marks)

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