RR310503 Data Communications B.Tech Question Paper : sphoorthyengg.com

Name of the College : Sphoorthy Engineering College
University : JNTUH
Department : COMPUTER SCIENCE AND ENGINEERING
Subject Name : DATA COMMUNICATIONS
Degree : B.Tech
Year/Sem : III/I
Website : sphoorthyengg.com
Document Type : Model Question Paper

Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/sphoorthyengg.com/4738-RR310503%20-%20DATA%20COMMUNICATIONS.pdf

Data Communications Question Paper :

B. Tech III Year I Semester Examinations, December-2011
(COMMON TO COMMON TO COMPUTER SCIENCE AND ENGINEERING, INFORMATION SECURITY)

Related : Sphoorthy Engineering College RR310505 Principles of Programming Languages B.Tech Question Paper : www.pdfquestion.in/4737.html

Time: 3 hours
Max. Marks: 80
Answer any five questions :
All questions carry equal marks :
1. Draw the ISO-OSI Model and discuss each layer. [16]
2. Explain different types of MODEMS used for data Communications. [16]
3. Write about the Synchronous Protocols. [16]

4. Explain the Public data networks. [16]
5. Discuss about point to Point Protocols. [16]
6. Compare between Switched Ethernet and Fast Ethernet. [16]

7. Discuss about the Packet Switching with an example. [16]
8. Explain the Architecture of ATM. [16]

RRCode No: RR310503 SET-2
1. Write about the Synchronous Protocols. [16]
2. Explain the Public data networks. [16]
3. Discuss about point to Point Protocols. [16]

4. Compare between Switched Ethernet and Fast Ethernet. [16]
5. Discuss about the Packet Switching with an example. [16]
6. Explain the Architecture of ATM. [16]
7. Draw the ISO-OSI Model and discuss each layer. [16]
8. Explain different types of MODEMS used for data Communications. [16]

RRCode No: RR310503 SET-3
1. Discuss about point to Point Protocols. [16]
2. Compare between Switched Ethernet and Fast Ethernet. [16]

3. Discuss about the Packet Switching with an example. [16]
4. Explain the Architecture of ATM. [16]
5. Draw the ISO-OSI Model and discuss each layer. [16]

6. Explain different types of MODEMS used for data Communications. [16]
7. Write about the Synchronous Protocols. [16]
8. Explain the Public data networks. [16]

RRCode No: RR310503 SET-4
1. Discuss about the Packet Switching with an example. [16]
2. Explain the Architecture of ATM. [16]

3. Draw the ISO-OSI Model and discuss each layer. [16]
4. Explain different types of MODEMS used for data Communications. [16]
5. Write about the Synchronous Protocols. [16]

6. Explain the Public data networks. [16]
7. Discuss about point to Point Protocols. [16]
8. Compare between Switched Ethernet and Fast Ethernet. [16]

Communication Theory Question Paper :
Answer any five questions :
All questions carry equal marks :
1. a) State and prove the following properties of the Fourier transform
i) Time scaling ii) Frequency shifting
b) The Fourier transform X(f) of a signal x(t) is defined by 1,01()02,0,0fXfff>???==???<?
Determine x(t) [8+8]

2. a) Discuss any four properties of power spectral density.
b) Explain Rayleigh probability density function. [8+8]

3. a) What is random variable?
b) Explain discrete and continuous random variable.
c) Distinguish between random variable and random processes. [4+4+6]

4. a) Derive a mathematical expressions for probability distribution function and probability density function.
b) Compare SSB with VSB. [10+6]

5. a) Draw the phasor diagram of AM and NBFM and explain.
b) Discuss the bandwidth consideration in FM. [10+6]
6. a) What is quantization error? Derive an expression for quantization error.
b) State and prove the sampling theorem in time domain. [8+8]

7. a) Determine the entropy of binary memoryless source.
b) A voice-grade channel of the telephone network has a bandwidth of 3.4 KHz
i) Calculate the information capacity of the telephone channel for a signal-to- noise ratio of 30dB.

ii) Calculate the minimum signal-to-noise ratio required to support information transmission through the telephone channel at the rate of 9.6 kbps. [8+8]
8. Write short notes on :
a) Cross talk
b) Convolutional codes
c) Adaptive delta modulation. [16]

RRCode No : RR311202 SET-2
1. a) What is random variable?
b) Explain discrete and continuous random variable.
c) Distinguish between random variable and random processes. [4+4+6]

2. a) Derive a mathematical expressions for probability distribution function and probability density function.
b) Compare SSB with VSB. [10+6]

3. a) Draw the phasor diagram of AM and NBFM and explain.
b) Discuss the bandwidth consideration in FM. [10+6]
4. a) What is quantization error? Derive an expression for quantization error.
b) State and prove the sampling theorem in time domain. [8+8]

5. a) Determine the entropy of binary memoryless source.
b) A voice-grade channel of the telephone network has a bandwidth of 3.4 KHz
i) Calculate the information capacity of the telephone channel for a signal-to- noise ratio of 30dB.