Data Communication 2016 – BSc Computer Science Part 2

Paper code: 13518
1518
B.Sc. (Computer Science) (Part 2)
Examination, 2016
Paper No. 3.3
DATA COMMUNICATION

Time: Three Hours] [Maximum Marks: 34

Note: Attempt any five questions in all. Question No. 1 is compulsory.

1. (a) What is meant by Data Communication and explain its characteristics?

(b) What are the components of DATA Communication?

2. (a) What is the purpose of cables being shielded and having twisted pairs?

(b) What happen when you use cables longer than the prescribed length?

3. (a) What is the technical difference between a loop and a ring network?

(b) What is the maximum data rate for a voice-grade line with a bandwidth of 4 kHz and a S/N ratio of 10000 to 1?

4. (a) List an advantage and disadvantage for serial transmission.

(b) Explain the three modes defined by HDLC.

5. (a) Give the three advantage and disadvantages of Frequency Division Multiplex.

(b) What are some advantages of X.25 packet switching networks?

6. (a) Explain the conversion process of digital to analog signal.

(b) Explain flow control mechanism in data link layer.

7. Write short notes on any three of the following:

1. Circuit switching
2. Packet switching
3. Error control

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