DISTANCE EDUCATION
M.Sc. DEGREE EXAMINATION, MAY 2016.
COMPUTER NETWORKS
(2002 Onwards)
Time Three hours Maximum 100 marks
SECTION A — (10 3 30 marks)
Answer ALL questions.
1. Define router.
2. What are the criteria used to evaluate transmission
medium?
3. What are the responsibilities of data link layer?
4. Write short notes on error correction.
5. What are network support layers and user support
layers?
6. Define IP address.
7. What are the techniques used in multiplexing?
8. What is the function of transport layer?
9. Write down the three types of WWW documents.
10. Define substitutional and transpositional encryption.
Sub. Code
22
DE-3669
2
wk7
SECTION B — × 10 40 marks)
Answer any FOUR questions.
11. Define the terms
Multi layer switch.
Protocol converter.
12. Write a brief note on communication satellites.
13. Briefly explain the point-to-point protocol.
14. Explain subnetting.
15. Write short notes on TCP.
16. Explain the four factors needed for secure network.
SECTION C — 15 30 marks)
Answer any TWO questions.
17. Explain in detail
ARP.
RARP.
ICMP.
18. Discuss the duties of transport layer.
19. Explain secret key encryption algorithm in detail.