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2003 Course Computer Networks

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Total No. of Questions : 12] [Total No. of Pages : 3 [3764]-221 P1472 B.E. (E & TC) COMPUTER NETWORKS (2003 Course) (404214) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates : 1) Answer 3 questions from Section I and 3 questions from Section II. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) What are the design issues for the layers? [4] b) What is acknowledged Datagram? What is unreliable datagram? [4] c) Explain Host, Subnet, Service primitives, CSMA/CA technique. [8] OR Q2) a) Explain mesh topology and its applications. What is extended Star topology. [4] b) Explain Broadcasting and Multicasting in Networks. [4] c) Explain Cut through and Store-forward modes in layer-2 switch. Show the position of Repeater, Bridge, Router and Application gateway wrt ISO - OSI reference model. [8] Q3) a) Draw & Explain the setup required & steps required for establishing internet communication using Dial up modem. [4] b) Explain Circuit Switching Vs Packet Switching. [4] c) What is ADSL technology? Also define VDSL, HDSL, SDSL, & DSLAM. [8] P.T.O.

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