JNTU Kakinada B-Tech 3-2 PT32052 I DATA COMMUNICATION R13 April 2018 Question Paper

Code No: PT32052
III B. Tech II Semester (Substitute Subject) Regular/ Supply Examinations, April – 2018
DATA COMMUNICATION (Common to CSE and IT)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B) 2. Answering the question in Part-A is compulsory
3. Answer any THREE Questions from Part-B
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PART ?A
1 a) Explain Peer-to-Peer client/server network. [4M]
b) Write a note on Transverse Electromagnetic wave. [4M]
c) List and explain the four most common methods of pulse modulation. [4M]
d) Define Electromagnetic Radiation. [3M]
e) List the features of personal communication system. [3M]
f) Define data communication modems and tell why they are used in data
communications circuits.
[4M]
PART ?B
2 a) Explain briefly about standards organization for data communication. [8M]
b) Define digital modulation? Give a brief description of amplitude-shift keying
and frequency-shift keying.
[8M]
3 a) Draw the electromagnetic frequency spectrum and explain it. [8M]
b) Write the advantage and disadvantages of optical fiber comparison.
[8M]
4 a) Define signal voltage-to-quantization noise ratio. Determine the SQR for
Linear PCM Code.
[8M]
b) Define T Carrier system? Describe a T1 carrier system.
[8M]
5 a) Draw the block diagram of microwave Radio link and explain it. [8M]
b) Write the advantages and disadvantages of Geosynchronous satellite.
[8M]
6 a) Briefly describe the basic functions of a standard telephone set. [8M]
b) Describe the united states digital cellular system.
[8M]
7 a) Define POSTNET. How logic 0s and 1s indicated with the POSTNET base
code
[8M]
b) Give the difference between asynchronous and synchronous modems. [8M]

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R13
SET – 1