DISTANCE EDUCATION
M.Sc. DEGREE EXAMINATION, MAY 2018.
COMPUTER NETWORKS
(2002 onwards)
Time Three hours Maximum 100 marks
PART A — (10 x 3 30 marks)
Answer ALL questions.
1. Distinguish between peer-to-peer relationship and a
primary-secondary relationship.
2. Why are protocols needed?
3. What are the disadvantages of optical fiber as a
transmission medium?
4. Give the relationship between propagation speed and
propagation time.
5. What is the purpose of hamming code?
6. Describe the three HDLC station types.
7. What are the network support layers and the user
support layers?
8. What is the function of SMTP?
9. How is a secret key different from public key?
10. What is a digital signature?
Sub. Code
22
DE-3885
2
SER
PART B — x 10 40 marks)
Answer any FOUR questions.
11. Describe about the network reference model.
12. Discuss about ISDN architecture.
13. Describe the Sliding window protocols with suitable
example.
14. With neat diagram describe about the TCP Header.
15. Describe about the address resolution protocols.
16. Explain the various compression techniques.
PART C — x 15 30 marks)
Answer any TWO questions.
17. Describe the carrier sense multiple access protocols.
18. Explain the Internet multicasting.
19. Describe about secret and public key algorithms.