COMPUTER NETWORKS (CN) MAY 2012 SEMESTER 5
Con. 4430-12 GN-8240
(3 Hours) [Total Marks : 100]
N.B : (1) Question No. 1 is compulsory.
(2) Solve any four questions out of the remaining.
(3) Marks assigned to the sub-questions as indicated.
| 1. (a) | With a neat diagram compare the uses and functions of different | (10) |
| hardware components/devices used in an inter network. | ||
| (b) | Compare virtual circuits and datagram subnets and show their | (10) |
| diagrammatic representation during congestion control. | ||
2. (a) | What are the advantages of a variable length frame over fixed | (10) |
| length frames. Explain the different framing methods. | ||
| (b) | Explain FDMA, TDMA and CDMA | (10) |
3. (a) | Derive the efficiency of pure Aloha protocol | (10) |
| (b) | A receiver receives the code 11001100111. When it applies the | (10) |
| Hamming code algorithm the result is 0101. Which bit has the | ||
| error? What is the correct Hamming code? | ||
4. (a) | Describe the IPv4 header format in detail. | (10) |
| (b) | Explain the three protocol scenarios for establishing a connection | (10) |
| using a 3-way handshake in TCP | ||
5. (a) | Explain DVR routing algorithm and mention the drawbacks of the | (10) |
| algorithm when put into practice | ||
| (b) | Explain the working of Transactional TCP | (10) |
6. (a) | List the design features to be taken care of as congestion | (10) |
| prevention policies in the different layers of network | ||
| (b) | Draw the layered structures and compare the two network | (10) |
| reference models-OSI and TCP/IP | ||
7. | Write notes on: (any two) | (20) |
| a) SONET | ||
| b) Ethernet frame formats | ||
| c) ADSL | ||
| d) Satellite Communication |
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