LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – COMPUTER SCI.
FIFTH SEMESTER – SUPPLEMENTARY – JUNE 2012
CS 5506 – INTRODUCTION TO DATA COMMUNICATION
Date : 27-06-2012
Time : 2:00 - 5:00
Dept. No.
Max. : 100 Marks
PART – A
(10 X 2 = 20 marks)
ANSWER ALL THE QUESTIONS
1. What do you mean by Data Communication?
2. Define protocols.
3. What is propagation time?
4. List out the terms used to describe the digital signals.
5. What is meant by frequency spectrum?
6. What is line coding?
7. Enumerate the three steps in transmission.
8. Define the term Modem.
9. What are the three major multiplexing techniques?
10. What is redundancy in network transmission?
PART –B
ANSWER ALL THE QUESTIONS
11. a) Discuss any two categories of network
(OR)
b) Describe briefly about network protocols.
12. a) Explain the peer-to-peer processes in OSI
(OR)
b) Distinguish between aperiodic and periodic signals.
13. a) Describe the three characteristics of a sine wave
(OR)
b) Write a short note on bandwidth.
14. a) Briefly discuss about Fiber optics cable.
(OR)
b) Write down the various connectors used for data transmission.
(5 X 8 = 40 marks)
15. a) Explain in detail the many-to-one multiplexing.
(OR)
b) What do you mean by multiplexing? Give the importance of time division multiplexing.
PART – C
ANSWER ANY TWO QUESTIONS
16. a) What do mean by internet model and explain its importance?
b) Discuss the function of each layer of the internet model
17. a) Explain the Digital Data Transmission in detail.
b) Explain unguided media in Transmission.
18. a) Discuss the modem standards and its specifications.
b) Explain Error correction Technique with an example.
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(2 X 20 = 40 marks)