LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE
FIFTH SEMESTER – APRIL 2012
CS 5506 – INTRODUCTION TO DATA COMMUNICATION
Date : 30-04-2012 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART – A
ANSWER ALL THE QUESTIONS: (10 X 2 = 20 Marks)
- What are the key elements of a protocol?
- Define topology.
- What are the functions of data link layer?
- Define periodic signal.
- Define Modem.
- What are the functions of DCE?
- Define transmission media.
- What is unguided media?
- What is the purpose of hamming code?
- List out the categories of Multiplexing.
PART-B
ANSWER ALL THE QUESTIONS: (5 X 8 = 40 Marks)
- a) Describe the characteristics and components of data communication.
(OR)
- b) Write Short notes on following:
- i) Internetworks
- ii) Categories of networks
- ) Explain the functions of transport layer.
(OR)
- b) Discuss the difference between Analog signals and Digital signals.
- a) Discuss the two types of Biphase encoding techniques.
(OR)
- b) Briefly explain the two methods of serial transmission.
- a) Write short notes on Bell Modem standards.
(OR)
- b) Explain Fiber optic cable with its advantages and disadvantages.
- a) Discuss the Frequency Division Multiplexing in detail.
(OR)
- b) Describe the various types of errors in data transmission.
PART-C
ANSWER ANY TWO QUESTIONS: (2 X 20 =40 Marks)
- a) Explain the following network topologies with its merits and demerits.
- Mesh 2.Star 3. Ring
- b) Explain the functions of various layers of OSI Model.
- a) Discuss in detail about NRZ, RZ encoding techniques.
- b) Explain the twisted pair and Coaxial cable of guided media in detail.
- a) Describe the types of transmission modes and line configuration.
- b) Discuss the Vertical Redundancy Check error detection method with examples.
Latest Govt Job & Exam Updates: