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2003 Course Computer Networks

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Total No. of Questions : 12] P984 [Total No. of Pages : 3 [3664]-194 B.E. (E & TC) COMPUTER NETWORKS (2003 Course) (404214) 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) 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) b) c) How do the layers of the TCP/IP model correlate to layers of OSI model. [8] What are the responsibilities of the data link layer. [4] Explain client server model. [4] OR Q2) a) b) c) Explain the TCP/IP protocol suite. [8] Differentiate between wired and wireless network. [4] Explain briefly the steps involved to establish network between two standalone computers. Also explain steps to form a network of more than 2 standalone machines. [4] Q3) a) What is DSL technology. What are the services provided by telephone companies using DSL? Distinguish between DSL modem and a [8] DSLAM. Distinguish between baseband and broadband transmission. [4] Explain the IEEE standards for the twisted pair cable, coaxial cable and fiber optic cable with their standard length, number of tappings and use. [4] b) c) OR P.T.O. Q4) a) b) c) Q5) a) b) c) Draw and explain typical cable TV system. How cable video signal and Internet data can be send over the same cable. [8] Compare LEO Vs MEO Vs GEO. [4] A channel has bandwidth of 1MHz. the SNR for the channel is 63. Calculate bit rate. Also calculate signal level for 4 Mbps bit rate. [4] Draw and explain the HDLC frame format. [6] Explain the static and dynamic channel allocation in LAN system. [6] Explain the DQDB system in brief for data communication. [6] OR Q6) a) b) c) Compare token bus Vs Token Ring system. Explain the fast Ethernet system and its requirements in detail. Explain any one collision free protocol. [6] [6] [6] SECTION - II Q7) a) b) c) Classify the routing algorithms and explain any one of them. What is QoS? Explain related parameters? Compare connection oriented Vs connection less service. [8] [4] [4] OR Q8) a) b) c) Compare virtual circuit Vs Datagram communication system. What are the duties of Transport layer in ISO-OSI system. What is network congestion? How one can overcome it? Q9) a) Draw and explain the basic encryption model? Also explain the concept [8] of stream cipher. Compare authentication and authorization. [4] Compare public key Vs private key cryptography. [4] b) c) OR [3664]-194 2 [8] [4] [4] Q10)a) b) c) Q11)a) b) c) What is importance of the DNS? Explain the component of the DNS system. [8] Explain the concepts of sockets with suitable example. [4] Explain the HTML programming and related TAGS in brief. [4] Compare FTP and TFTP protocol in detail. [6] Explain with suitable example the use of TFTP and BOOTP protocols. [6] Explain the ICMP protocol with different commands utility. [6] OR Q12)a) b) c) Explain the DHCP communication with suitable example. Explain the Traceroute utility in Internet applications. Explain the role of NFS and RPC in TCPIP communication. vvvv [3664]-194 3 [6] [6] [6]

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