(FOR THE CANDIDATES ADMITTED (NO.OF PAGES: 3)
DURING THE ACADEMIC YEARS
2006 AND 2007 ONLY) 06 PMC301
NGM COLLEGE (AUTONOMOUS) :: POLLACHI
END – OF – SEMESTER EXAMINAITONS : NOVEMBER – 2008
M.C.A. MAXIMUM MARKS: 70
III SEMESTER TIME: 3 HOURS
COMPUTER NETWORKS
SECTION – A
ANSWER ALL THE QUESTIONS. (10 X 1 = 10 MARKS)
1. What are servers?
2. What is Internet?
3. What is a twisted pair?
4. What do you mean by bandwidth?
5. What does Frame contain?
6. What is byte stuffing?
7. What is the role of network layer?
8. What is a routing algorithm?
9. DNS stands for ---------
10. SMTP stands for --------
(CONTD…2)
(2) (06 PMC 301)
SECTION – B
ANSWER EITHER “a” OR “b” IN EACH OF THE FOLLOWING
QUESTIONS. ( 5 X 4 = 20 MARKS )
11. a) Write notes on LAN.
(OR)
b) List out the seven layers of OSI reference model.
12. a) Discuss about communication satellites.
(OR)
b) Explain co-axial cable medium.
13. a) Bring out the design issues of Data Link Layer.
(OR)
b) Explain any one of the Elementary Data Link Protocols.
14. a) Write about store – and – Forward packet switching.
(OR)
b) What is meant by Multiplexing? Explain.
15. a) Explain DNS name space.
(OR)
b) Write about static web documents.
SECTION – C
ANSWER EITHER “a” OR “b” IN EACH OF THE FOLLOWING
QUESTIONS. (5 X 8= 40 MARKS)
16. a) Describe the uses of computer Networks in Business Applications
and Home applications.
(OR) (CONTD…3)
(3) (06 PMC 301)
b) Discuss the design issues for the Layers.
17. a) Explain Magnetic Media and Twisted pair.
(OR)
b) Bring out the structure of the Telephone System.
18. a) Discuss in detail Error Correcting Codes.
(OR)
b) Explain the concepts behind protocol verification.
19. a) Explain shortest path routing and Flooding.
(OR)
b) Explain in detail the Transport service.
20. a) Discuss the architecture and services of E – Mail.
(OR)
b) Explain the concept of Cryptography.
A7.