Mahatma Gandhi University (MGU) 2007 M.Sc Electronic Science Data Communication Networks - Question Paper

M.Sc. DEGREE EXAMINATION, JANUARY 2007

Third Semester

Branch : Electronics

DATA COMMUNICATION NETWORKS

Time : 3 Hours Maximum : 75 Marks

Part A

ans any 6 ques..
every ques. carries two marks.

1. What is PSTN?
2. What is the function of a modem?
3. Name any 2 multiplexing techniques.
4. Name the most popular LAN technology.
5. What is ISDN?
6. Define Internet.
7. What is meant by “Protocol”?
8. What is facsimile?
9. Draw the bus topology of a network.
(6 X two = 12 marks)

Part B

ans any 3 ques..
every ques. carries five marks.

10. Explain Polling.
11. Explain the role of Session layer in OSI model.
12. Distinguish ranging from LAN and MAN.
13. What is packet switching?
14. What is teletext?
(3 X five = 15 marks)

Part C

ans all ques..
every ques. carries 12 marks.

15. (a) Draw the block diagram of a digital communication system and discuss briefly, the functions of every block.
Or
(b) elaborate the different network topologies? Compare their relative advantages.
16. (a) Draw the diagram of the OSI reference model and briefly discuss the functions of every layer.
Or
(b) discuss what is multiple access and define any 1 of the multiple access techniques in detail.
17. (a) elaborate the various classifications of a data communication network? discuss every of them.
Or
(b) discuss CSMA/CD in detail.
18. (a) Draw the circuit of any A/D converter and discuss its working.
Or
(b) Write detailed tech. notes on internet tools.
(4 X 12 = 48 marks)

Earning:   Approval pending.