LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

NA 08

   B.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE

FIFTH SEMESTER – November 2008

CS 5506 – INTRODUCTION TO DATA COMMUNICATION

 

 

 

Date : 07-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART – A

Answer all the questions.                                                      (2 x 10 = 20 marks)

 

1. Define Topology.
2. What is a network?
3. List the various protocol standards.
4. List the OSI layers.
5. What is analog and digital signal?
6. What is encoding?
7. Define interface.
8. What is modem?
9. Write down the Transmission characteristics of coaxial cable.
10. Write down the components of Telephone system.

 

PART – B

Answer all the questions.                                                      (5 x 8 = 40 marks)

 

11. (a) Explain about the categories of networks.

(or)

(b) Discuss about standards of organization.

12. (a) Explain the various Digital signal encoding formats with neat diagrams.

(or)

(b) With an aid of a diagram explain the difference between phase modulation and frequency

modulation.

13. (a) Describe in detail DTE-DCE interface.

(or)

(b) Describe about digital transmission of data.

14. (a) List and explain the categories of guided medium and discuss the merits and demerits of

each.

(or)

(b) Explain about the MODEM standards.

15. (a) Explain in detail about Hamming Code in error correction.

(or)

(b) Explain CRC for error detection.

PART – C

Answer any TWO.                                                                (2 x 20 = 40 marks)

 

16. (a) Discuss about line configuration.

(b) Explain the functionalities of network layer

17. (a) Explain encoding techniques in Transmission.

(b) Differentiate periodic and aperiodic signals.

18. (a) Explain the types of multiplexing

(b) What are the types of errors and specify the techniques to identify those errors.

 

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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)

 

1. Define the term data communication.
2. Define internetwork.
3. What is meant by Open system?
4. Define Amplitude.
5. What are the types of digital- to-digital encoding?
6. Compare and contrast Manchester and Differential Manchester encoding.
7. What are the use of category 3 in Electronic Industries Association?
8. Define Radio Government ratings(RG).
9.  Define Channel.
10. What is meant by inverse multiplexing?

PART – B

 

ANSWER ALL THE QUESTIONS:                                                                             (5 x 8=40 marks)

 

1. a) Explain the components involved in data communication systems.

(Or)

1. b) List out the different transmission modes and explain it.

 

1. a) Explain the difference between bit internal and bit rate.

(Or)

1. b) Explain the organization of the layers in the OSI model.

 

1. a) Explain in detail  about the following

1. Data Terminal Equipment
2. ii) Data Circuit Terminating Equipment.

(Or)

1. b) Write a note on EIA 232 standard.

 

1. a) Write short note on advantages and disadvantages of optical fiber?

(Or)

1. b) Write a short note on bell modem standards.

 

1. a) Explain about the Wave-Division Multiplexing.

 

(Or)

 

1. b) Explain in detail about the single-Bit error correction.

 

 

PART – C

 

ANSWER ANY TWO QUESTIONS:                                                                        (2 X 20 = 40 marks)

 

16. a) Explain following Network topologies in detail with an example.
17. i) Bus
18. ii) Ring

 

1. b) Explain the three necessary criteria for an effective and efficient network?

 

17. a) Discuss in detail about the services offered by Session layer and Transport layer.

 

1. b) Discuss in detail about Analog –to- analog conversion.

 

18. a) Explain in detail about the frequency division multiplexing.

 

1. b) Explain any one error correction technique in detail.

 

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE

FIFTH SEMESTER – APRIL 2011

CS 5506 – INTRODUCTION TO DATA COMMUNICATION

 

 

 

Date : 19-04-2011              Dept. No.                                          Max. : 100 Marks

Time : 1:00 – 4:00

 

PART – A

 

ANSWER ALL THE QUESTIONS:                                                                      (10 x 2 = 20 marks)

 

1. What are the fundamental characteristics for effectiveness of a data communication?
2. Define multipoint network.
3. What is meant by peer-to-peer processes?
4. Define Frequency.
5. What are the five broad categories of line coding schemes?
6. Write a note on Bipolar with 8-zero substitution(B8ZS).
7. What are the use of twisted –pair cables?
8.  List out the advantages of Optical Fiber.
9.  Define Channel.
10. What is meant by burst error?

PART – B

ANSWER ALL THE QUESTIONS:                                                                      (5 x 8=40 marks )

 

 

1. a) What is the difference between half-duplex and full duplex transmission modes?

(Or)

1. b) List out the five components of a data communication system and Explain it.

 

1. a) Discuss about peer-to-peer processes in OSI with necessary figure.

(Or)

1. b) Explain the services of the session layer .

 

1. a) Differentiate between Manchester and differential Manchester schemes.

(Or)

b)What are the functions of pins in EIA-232 DB-25?

 

1. a) Write down the specifications of the major Bell Modems.

(Or)

1. b) Explain the advantages and disadvantages of optical fiber.

 

1. a) Discuss in detail about the Time-Division Multiplexing.

(Or)

1. b) Explain the following types of redundancy checks used in data communication.
2. a) Vertical Redundancy Check b) Longitudinal Redundancy Check

 

PART – C

 

ANSWER ANY TWO QUESTIONS                                                                     (2×20=40 marks)

 

16. a) Explain the topologies with an example.
17. i) Bus ii) Ring

 

1. b) Discuss in detail about the services offered by Data link layer and Transport layer.

 

17. a) Describe the types of polar encoding used in digital – to – digital conversion.

 

1. b) What are the three types of digital services available to telephone customers?

 

18. a) Explain error correction in detail.

 

1. b) Explain the Types of Computer Networks with Examples.

 

 

 

 

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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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