R09 - December, 2011 - Regular Examinations - Set - 1.

B. Tech III Year I Semester Examinations, December-2011
DATA COMMUNICATION AND COMPUTER NETWORKS
(COMPUTER SCIENCE AND ENGINEERING)
Time: 3 hours Max. Marks: 75
Answer any five questions
All questions carry equal marks
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1.a) Compare various categories of Network topologies.
b) What are the key elements of a protocol? List out various standard organization that develop protocol standards. [15]
2.a) Compare ADSL, VDSL, HDSL and SDSL Technologies.
b) Explain the operation of cable TU Networks. [15]
3.a) Describe LRC, VRC, Checks and CRC methods of Error detection.
b) Explain function and frame formats of MAC and physical layers of IEEE 802.11.
[15]
4.a) Explain the function of various Inter connecting devices.
b) Discuss Frequency reuse Principle and Hard off mechanism used in Cellular Telephony. [15]
5.a) Compare IPV4 and IPV6.
b) Discuss IGMP messages and its formats.
c) What is multicast routing? Explain. [15]
6.a) What are the Services and application of TCP? Compare TCP and UDP Protocol.
b) What is Congestion? Explain the causes and effects of congestion. [15]
7.a) Give DNS Message types and its header format.
b) Explain File Transfer Protocol. [15]
8. Write a brief note on
i) Web documents
ii) Audio & Video Compare. [15]
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