B Tech Study Material

B.Tech CSE Data Communications Imp Questions for Exams Chapters 3-4

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Unit 3:

1. Discuss about point to Point Protocols. [Dec 11]
2. Compare between Switched Ethernet and Fast Ethernet. [Dec 11]
3. Describe the HDLC operational modes. [Jan 12]
4. What are the three frame formats used with SDLC? Explain [Jan 12]
5. Describe any two methods of error correction. [Jan 12]
6. What are the functions of data link layer? Explain stop & wait Protocol. [Dec 11]
7. Describe Architecture and layers of Bluetooth
8. Describe LRC, VRC, Checks and CRC methods of Error detection
9. Explain function and frame formats of MAC and physical layers of IEEE 802.11
10. Describe the frame formats of HDCL Protocol
11. Explain physical layer implementation of fast Ethernet and standard Ethernet.
12. Explain and compare the performance of Random access protocols.
13. Give the characteristics of TDMA, FDMA and CDMA.

Unit 4:

1. Explain the Architecture of ATM. [Dec 11]
2. What are the advantages and disadvantages of geosynchronous satellites? [Jan 12]
3. Discuss First generation and second generation cellular telephone systems in detail [May 11]
4. Briefly describe crosstalk? [ May 11]
5. Describe the difference between the operation of a cordless telephone and a Standard telephone? [May 11]
6. Explain Architecture, Layers and frame format of SONET? [Dec 11]
7. Compare 1st and 2nd and 3rd generation of Cellular Telephony? [Dec 11]
8. Explain the function of various Inter connecting devices? [Dec 11]
9. Discuss Frequency reuse Principle and Hard off mechanism used in Cellular Telephony. ? [Dec 11]
10. What are Back bone Networks? Explain? [Dec 11]
11. Explain the operation of Linear, Mesh and Ring SONET Networks. ? [Dec 11]
12. Compare the features of Frame relay & ATM Networks ? [Dec 11]
13. Describe Architecture and Layers of ATM Networks? [Dec 11]

B.Tech CSE – Data Communications Important Questions from Unit 1 and 2

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UNIT 1:

1. Draw the ISO-OSI Model and discuss each layer? [May 2011, Dec 11]
2. Explain different types of MODES used for data Communications? [Dec 11, Jan 12]
3. Describe briefly the seven layer architecture and its importance in computer networks. [Jan 12]
4. Describe the terms Information capacity, bitrates, band rate and Nyquist bandwidth. [May 11]
5. What are the various factors involved in designing computer network? Explain? [Dec 11]
6. Compare various categories of Network topologies [Dec 11]
7. What are the key elements of a protocol? List out various standard organization that develop
protocol standards. [Dec 11]
8. Explain various components of data communication system [Dec 11]
9. Compare LAN, MAN and WAN. [Dec 11]
10. Discuss the function of various layers of OSI Mode/ and compare with TCP/ IP Model?[Dec 11]
11. Distinguish between various Levels of addressing used in the Internet Give suitable examples?
[Dec11]
12. Explain the following terms [Dec 11]
i] Throughput
ii] Latency
iii] Bandwidth delay Product
iv] Jitter.

Unit 2

1. Discuss about the Packet Switching with an example [Dec 11]
2. Explain the difference between shielded twisted pair and unshielded twisted pair transmission lines. [Jan 12]
3. Compare Balanced and unbalanced Transmission lines [May 11]
4. Explain the characteristics of coaxial cable transmission lines [May 11,Dec 11]
5. What are the Predominant – losses associated with optical fibres? Explain [May 11]
6. What is the importance of critical angle with respect to optical fibre cable? [Dec 11]
7. Explain and compare the characteristics of Guided and unguided Transmission media?[Dec 11]
8. Compare ADSL, VDSL, HDSL and SDSL Technologies? [Dec 11]
9. Explain the operation of cable TV Networks. ? [Dec 11]
10. Distinguish between synchronous and Asynchronous Time division Multiplexing?[Dec 11]
11. Compare circuit switching and Packet switching techniques? [Dec 11]
12. Describe Major components of a Telephone Network. ? [Dec 11]
13. Give the Services provided by Telephone Network? [Dec 11]

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