Data Communication 2017 – BSc Computer Science Part 2

Paper code: 13518
1518
B.Sc. (Computer Science) (Part 2)
Examination, 2017
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 are the components involved in data communication?

(b) Explain the role of data communication.

2. (a) Differentiate the guided media and the unguided media with examples.

(b) How is analog signal different from digital signal?

3. (a) What are various technique of data encoding? Explain.

(b) Give five differences between synchronous and Asynchronous transmission.

4. (a) Describe the following terms:

1. Bandwidth
2. SNR

(b) Give the applications of the following types of cables:

1. Coaxial cable
2. Optical cable

5. (a) Define the term “HDLC”. What are various modes of HDLC?

(b) Describe time division multiplexing. How is it different from frequency division multiplexing?

6. (a) Differentiate circuit switching and packet switching.

(b) Elaborate X.25 in detail.

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

1. Switch and Router
2. Wireless transmission
3. Twisted cables

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