LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE
FIFTH SEMESTER – NOVEMBER 2010
CS 5506 – INTRODUCTION TO DATA COMMUNICATION
Date : 03-11-10 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART – A
ANSWER ALL THE QUESTIONS: (10 x 2 = 20 marks)
- Define the term data communication.
- Define internetwork.
- What is meant by Open system?
- Define Amplitude.
- What are the types of digital- to-digital encoding?
- Compare and contrast Manchester and Differential Manchester encoding.
- What are the use of category 3 in Electronic Industries Association?
- Define Radio Government ratings(RG).
- Define Channel.
- What is meant by inverse multiplexing?
PART – B
ANSWER ALL THE QUESTIONS: (5 x 8=40 marks)
- a) Explain the components involved in data communication systems.
(Or)
- b) List out the different transmission modes and explain it.
- a) Explain the difference between bit internal and bit rate.
(Or)
- b) Explain the organization of the layers in the OSI model.
- a) Explain in detail about the following
- Data Terminal Equipment
- ii) Data Circuit Terminating Equipment.
(Or)
- b) Write a note on EIA 232 standard.
- a) Write short note on advantages and disadvantages of optical fiber?
(Or)
- b) Write a short note on bell modem standards.
- a) Explain about the Wave-Division Multiplexing.
(Or)
- b) Explain in detail about the single-Bit error correction.
PART – C
ANSWER ANY TWO QUESTIONS: (2 X 20 = 40 marks)
- a) Explain following Network topologies in detail with an example.
- i) Bus
- ii) Ring
- b) Explain the three necessary criteria for an effective and efficient network?
- a) Discuss in detail about the services offered by Session layer and Transport layer.
- b) Discuss in detail about Analog –to- analog conversion.
- a) Explain in detail about the frequency division multiplexing.
- b) Explain any one error correction technique in detail.