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2003 Course Computer Network

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Total No. of Questions : 12] [Total No. of Pages :2 [3864] - 241 B.E. (Electronics) COMPUTER NETWORK (2003 Course) P1144 Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any 3 questions from each section. 2) Answers to the two sections should be written in separate books. 3) 4) 5) 6) Neat diagrams must be drawn wherever necessary. Figures to the right indicate full marks. Your answers will be valued as a whole. Use of logarithmic tables, slide rule, mollier charts, electronic pocket calculator and steam tables is allowed. Assume suitable data, if necessary. 7) SECTION - I Q1) a) b) Explain the following for LAN. i) Topologies. ii) Wired & Wireless LAN. iii) Hidden and Exposed station problem. [10] Distinguish between broadcast and point - to - point Communication.[8] OR Q2) a) b) Q3) a) b) Explain the design issues of any three. Layers of OSI - Model. Distinguish between OSI and TCP / IP. [10] [8] Compare the performance of various transmission media used for data communication. [10] Explain GEO and MEO comparing their applications. [6] OR P.T.O. Q4) a) Explain the network components. i) Q5) a) b) Modem. iii) b) Switches. ii) [9] Hub. Explain the various switching techniques used for data communication.[7] State and explain the protocols for collision avoidance. Explain the sliding window protocols. [10] [6] OR Q6) a) b) c) Explain the framming controls. Explain the frame - formate for IEEE 802.3. State and explain DQDB. [6] [6] [4] SECTION - II Q7) a) b) Explain the Bellman ford algorithm in detail. Explain how number of switches affects the routing. [6] [10] OR Q8) a) b) Differentiate virtual circuit and datagram services. [6] In a network using a token bucket scheme for traffic shaping. A new token is put into bucket every 5 - sec. What is the maximum sustainable net data rate (exclude the header bit). [10] Q9) a) b) Describe the security issues for internet. [8] State and explain the suitable protocol for 64 - bit data encryption and decryption. [10] OR Q10)a) b) Explain the DNS in detail. Explain the video on Demand. Q11)a) b) Compare IPV - 4 and IPV - 6. Explain : FTP and telnet protocol. [8] [10] [8] [8] OR Q12)a) b) Explain IP Addressing. Explain SNMP & RARP. [3864] - 241 ***** -2- [8] [8]

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