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)

 

1. What are the key elements of a protocol?
2. Define topology.
3. What are the functions of data link layer?
4. Define periodic signal.
5. Define Modem.
6. What are the functions of DCE?
7. Define transmission media.
8. What is unguided media?
9. What is the purpose of hamming code?
10. 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)

1. b) Write Short notes on following:
2. i) Internetworks
3. ii) Categories of networks

 

• ) Explain the functions of transport layer.

(OR)

1. b) Discuss the difference between Analog signals and Digital signals.

 

• a) Discuss the two types of Biphase encoding techniques.

(OR)

1. b) Briefly explain the two methods of serial transmission.

 

• a) Write short notes on Bell Modem standards.

(OR)

1. b) Explain Fiber optic cable with its advantages and disadvantages.

 

• a) Discuss the Frequency Division Multiplexing in detail.

(OR)

1. 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.

1. Mesh  2.Star              3. Ring
2. b) Explain the functions of various layers of OSI Model.

 

• a) Discuss in detail about NRZ, RZ encoding techniques.

1. b) Explain the twisted pair and Coaxial cable of guided media in detail.

 

• a) Describe the types of transmission modes and line configuration.

1. b) Discuss the Vertical Redundancy Check error detection method with examples.

 

 

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE

FIFTH SEMESTER – NOVEMBER 2012

CS 5506 – INTRODUCTION TO DATA COMMUNICATION

 

 

 

Date : 06/11/2012             Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART – A                                         

Answer ALL the questions:                                                                                     (10 x 2 = 20 marks)

           

1. Define protocol.
2. Write about star topology.
3. Differentiate periodic signal and aperiodic signal.
4. Define peak amplitude.
5. What is meant by data encoding?
6. Define Data Terminal Equipment.
7. Write the use of Fiber-optic cable.
8. Differentiate Radio wave and micro wave.
9. Define Wave Division Multiplexing.
10. What is meant by burst error?

                                

PART – B

 

Answer ALL the questions:                                                                                     (5 x 8 = 40 marks)

           

 

11. a) List and Explain about the components involved in data communication system.

                                                            (OR)

1. b) Write about the different transmission modes in detail.

 

12. a) Write about the organization of the layers in the OSI model.

                                                            (OR)

1. b) Explain about the Digital signals in detail.

 

13. a) Explain about the analog – to – analog conversion.

                                                            (OR)

1. b) Write notes on EIA232 standards.

 

14. a)   Explain about the modem standards in detail.

                                                            (OR)

1. b) Write about the advantages and disadvantages of optical fiber.

 

15. a)  Explain about the Time Division Multiplexing.

                                                            (OR)

1. b) Write about the Error correction.

 

PART – C                                         

Answer any TWO questions:                                                                                   (2 x 20 = 40 marks)

 

 

16. a) Explain in detail about the categories of networks.

 

1. b) Explain about the Functions of layers in detail.

 

 

17. a) Discuss in detail the Data Terminal Equipment.

 

1. b) Explain about the digital – to – digital conversion.

 

 

18. a) Describe about the Frequency Division Multiplexing.

 

1. b) Explain the following:
2. i)   Parity Check
3. ii) Cyclic Redundancy Check.

 

 

 

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