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Unformatted text preview: Code No: R05410401 Set No. 1 IV B.Tech I Semester Regular Examinations, November 2008 COMPUTER NETWORKS ( Common to Electronics & Communication Engineering, Electronics & Instrumentation Engineering, Bio-Medical Engineering, Mechatronics and Electronics & Telematics) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆ ⋆ ⋆ ⋆ ⋆ 1. (a) Compare point -to-point channels with broadcast channels along with suitable examples? (b) A collection of five routers is to be collected in a point-to-point subnet. Be- tween each pair of routers, the designers may put a high speed line, a medium- speed line, a low-speed line, or no line. If it takes 100ms of computer time to generate and inspect each topology, how long will it take to inspect all of them to find the one that best matches the expected load? [8+8] 2. (a) Television channels are 6MHz wide. How many bits/sec can be sent if four level digital signals are used? Assume a noiseless channel (b) How does a virtual circuit differ from a physical circuit? What advantages would a virtual circuit provide? [8+8] 3. (a) Explain one -bit sliding window protocol. Give the advantages and disadvan- tages of one-bit sliding window protocol? (b) Discuss the services provided by the data link layer to the network layer? [8+8] 4. (a) Discuss about MAC addresses? (b) Explain about a bit-map collision free protocol? [8+8] 5. What is non- adaptive routing. Explain any two non- adaptive routing algorithms.  6. (a) How connections are setup and released in ATM? (b) What is the Format of routing table in ATM? How it helps in routing cells? [8+8] 7. (a) Explain the techniques for controlling packet life time....
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This note was uploaded on 02/23/2012 for the course CS 101 taught by Professor Martand during the Spring '10 term at Punjab Engineering College.
- Spring '10
- Computer Networks