R09 - December, 2011 - Regular Examinations - Set - 3.

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. Discuss the function of various layers of OSI Mode/ and compare with TCP/ IP Model. [15]
2.a) Distinguish between synchronous and Asynchronous Time division Multiplexing.
b) Compare circuit switching and Packet switching techniques. [15]
3.a) Describe the frame formats of HDCL Protocol.
b) Explain physical layer implementation of fast Ethernet and standard Ethernet.
[15]
4.a) What are Back bone Networks? Explain.
b) Explain the operation of Linear, Mesh and Ring SONET Networks. [15]
5.a) Give the frame format of IPV4. Explain the function of each field.
b) Describe the Procedure used for Checksum Calculation in IPV4. [15]
6.a) Explain and compare various techniques used to improve QOS.
b) Compare Integrated & Differential Services. [15]
7.a) Explain name – address and address – name resolution process.
b) Discuss commands and responses used in SMTP. [15]
8. Write a brief note on
i) Simple Network Management Protocol.(SNMP)
ii) RTP. [15]
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