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1997 Course Communication Networks

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Total No. of Questions : 8] P1573 [Total No. of Pages : 2 [3764]-1033 B.E. (E & TC) COMMUNICATION NETWORKS (404188) (1997 Course) Time : 3 Hours] [Max. Marks :100 Instructions to the candidates : 1) Answer any 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) Compare SMDS and X.25 technology. [8] Explain ATM header in detail. What is B-ISDN? [8] Draw & explain HDLC & PPP frame format in detail. [8] b) What is 802.x Vs 802.y Bridge? [4] c) Compare repeater Vs layer-2 Switch. [4] b) Q2) a) Q3) a) Draw & explain IEEE-802.3 frame format. Also explain significance of PAD field. [8] b) Explain any one framing technique used at LLC layer. [4] c) Explain IEEE-802.6-DQDB technique in brief. [4] Q4) Write a short note on any three: a) 802.3 Vs. 802.5 technique. b) LEO Vs MEO Vs GEO. c) Ad-Hoc Wireless networks. d) [18] FDDI backbone. P.T.O. SECTION - II Q5) a) Explain the applications of ICMP, IGMP, ARP and RARP protocols.[8] b) Compare IPV4 Vs IPV6. [4] c) Compare virtual circuit Vs Datagram. [4] Q6) a) Explain Transport layer functions & Transport layer Primitives in detail. [8] b) Draw & Explain UDP header in detail. [4] c) Explain any Traffic shaping algorithm. [4] Q7) a) Messages independently arrive to a system at the rate of 10 per minute. Their lengths are exponentially distributed with an average of 3600 characters. They are transmitted on a 9600 bps channel. A character is 8 bits long. Calculate i) Average service time Ts. ii) What is arrival rate A. iii) What is Service rate D. iv) What is utilization of server U. [8] b) Explain RSA algorithm with example. [4] c) Explain Erlang-B function. [4] Q8) Write short note on any three: [18] a) SNMP system. b) HTML programming. c) Socket programming. d) Explain M/M/1 queue system. Y [3764]-1033 2

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