R09 - December, 2011 - Regular Examinations - Set - 2.

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) Explain various components of data communication system.
b) Compare LAN, MAN and WAN. [15]
2. Explain and compare the characteristics of Guided and unguided Transmission media. [15]
3.a) What are the function of data link layer? Explain stop & wait Protocol.
b) Describe Architecture and layers of Bluetooth. [15]
4.a) Explain Architecture , Layers and frame format of SONET.
b) Compare 1st and 2nd and 3rd generation of Cellular Telephony. [15]
5.a) Discuss various types of ICMP messages.
b) Explain Distance Vector and link state routing Protocols. [15]
6.a) What is Quality of Service ? Explain.
b) Give the features of various types of data traffic.
c) Explain TWO Congestion control mechanisms. [15]
7.a) Explain how DNS is used in the Internet.
b) Explain the services of an user agent of electronic mail. [15]
8. Write a brief note on:
i) Network Management System.
ii) Streaming Live Audio / Video. [15]
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