MU Computer Engineering (Semester 5)
Computer Network
May 2015
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 are the design issues for the Layers?
4 M
1 (b) Differentiate between Aloha and Slotted Aloha.
4 M
1 (c) Explain in short different framing Methods.
4 M
1 (d) How does the Token Bucket Algorithm works?
4 M
1 (e) Why does the data link protocol always the CRC in a trailer rather than in a header?
4 M

2 (a) Explain Sliding window Protocol using Go Back-N technique.
10 M
2 (b) Describe the OSI Reference Model with a neat diagram.
10 M

3 (a) What is the function of IP Protocol? Discuss its header format.
10 M
3 (b) Discuss the quality of service parameters in computer network.
10 M

4 (a) What is count to infinity problem in distance vector routing? Discuss in detail.
10 M
4 (b) Explain three way handshake technique in TCP.
10 M

5 (a) Explain the need for DNS and describe the protocol functioning.
10 M
5 (b) Explain CSMA Protocol. Explain how collisions are handled in CSMA/CD.
10 M

Write short notes on the following:
6 (a) Functions of Session Layer.
5 M
6 (b) Address Resolution Protocol (ARP).
5 M
6 (c) Berkeley Socket.
5 M
6 (d) Differentiate between OSPF and BGP.
5 M



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