09a50508 - Data Communication and Computer Networks

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R09Code No: 09A50508 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 questionsAll 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 organizationthat 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 documentsii) Audio & Video Compare. [15]

--ooOoo--

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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]

--ooOoo--

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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 oni) Simple Network Management Protocol.(SNMP)

ii) RTP. [15]

--ooOoo--

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1.a) Distinguish between various Levels of addressing used in the Internet Give

suitable examples.b) Explain the following terms

i) Throughput

ii) Latencyiii) Bandwidth delay Product

iv) Jitter. [15]

2.a) Describe Major components of a Telephone Network.

b) Give the Services provided by Telephone Network. [15]

3.a) Explain and compare the performance of Random access protocols.b) Give the characteristics of TDMA, FDMA and CDMA. [15]

4.a) Compare the features of Frame relay & ATM Networksb) Describe Architecture and Layers of ATM Networks. [15]

5.a) What is logical addressing? Discuss IPV 4 addressing.

b) Compare IPV4 and IPV6. [15]

6.a) Give the features of differentiated Services.

b) Explain RSVP Protocol used in Integrated services. [15]

7.a) Explain the modes of operation of TELNET.

b) Explain the process of transferring a mail message. [15]

8. Write a brief note on:i) HTTP

ii) Voice over IP. [15]

--ooOoo--

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09a50508 - Data Communication and Computer Networks