M.C.A. DEGREE EXAMINATION,
NOVEMBER 2017
Third Semester
Computer Applications
COMPUTER NETWORKS
(Common for M.C.A. M.C.A.
(CBCS 2012 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Define network.
2. Name the factors that affect the performance of the
network.
3. What are the responsibilities of DLL?
4. List the error detection methods.
5. Define circuit switching.
6. Define router.
7. What are the transport service primitives?
Sub. Code
541303/
545303
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8. Define connection oriented service.
9. What do you mean by Encryption?
10. What is cryptanalysis?
Part B x 5 25)
Answer all questions choosing either or
11. List down the uses of computer networks.
Or
Explain: Internetworks.
12. Discuss: DLL design issues.
Or
Explain: Sliding window protocols.
13. Discuss the issues involved in the implementation
of connectionless service.
Or
Compare virtual circuits and datagram networks.
14. Discuss: Domain Name system.
Or
Discuss: Remote procedure call.
15. Write short notes on substitution ciphers.
Or
Give RSA algorithm with example.
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Part C 10 30)
Answer any three questions.
16. With a neat diagram, explain the different OSI layers.
17. Give a note on CSMA protocols.
18. Discuss the congestion control algorithms.
19. Explain: WWW.
20. Explain in detail the data encryption standard algorithm.
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