MU Computer Engineering (Semester 5)
Computer Network
December 2011
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1(a) What is the principle difference between connectionless communication and connection oriented communication?
5 M
1(b) Consider the delay of pure ALOHA versus slotted ALOHA at low load. Which one is less? Explain your answer.
5 M
1(c) Give one advantage of RPC on UDP over transactional TCP. Give one advantage TCP over RPC.
5 M
1(d) Compare and contrast a circuit switching and packet switching network.
5 M

2(a) Define fragmentation and explain why the IPV4 and IPV6 protocols need to fragment some packets. Is there any difference between the two protocols in this matter?
10 M
2(b) An 8 bit byte with binary values 10101111 is to be encoded using an even parity hamming code. What is the binary value after encoding?
10 M

3(a) What is the function of TCP protocol? Discuss it's header format.
10 M
3(b) Explain sliding window protocol using Go Back-M Techniques.
10 M

4(a) Explain Dijkstra's algorithm as shortest path routing with example?
10 M
4(b) Explain working of following network components and state in which layer they work? Repeaters, Hubs, Bridges, Routers, Switches and Gateways.
10 M

5(a) What is IPV4 protocol? Explain the IPV4 Header format with diagram?
10 M
5(b) What is purpose of Digital Subscriber Line (DSL)? Explain ADSL.
10 M

6(a) What are transport service primitives?
10 M
6(b) Explain framing, flow and error control in data Link layer?
10 M

Write short notes on any four of the following:-
7(a) SONET
5 M
7(b) ADHOC Networking
5 M
7(c) Bluetooth Architecture
5 M
7(d) Comparison of 802.3 and 802.11
5 M
7(e) Berkeley Socket
5 M



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