MU Electronics and Telecom Engineering (Semester 7)
Computer Communication Networks
December 2013
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) Explain the difference between data link layer delivery and network layer delivery.
5 M
1 (b) Differentiate between circuit switching and packet switching.
5 M
1 (c) Why do you require a limit on minimum size of Ethernet frame?
5 M
1 (d) Explain ALOHA and slotted ALOHA.
5 M

2 (a) What does the term error control mean in the data link layer? Explain Go-Back ARQ and selective repeat ARQ protocols.
10 M
2 (b) Explain OSI model and explain the process of encapsulation in detail.
10 M

3 (a) Explain in detail HDLC protocol with all the frame types supported by HDLC. Differentiate HDLC and PPP protocols.
10 M
3 (b) Discuss various scheduling medium access control techniques.
10 M

4 (a) Explain exterior and interior routing. Explain in brief distance vector routing and Link state routing.
10 M
4 (b) Write a note on IEEE 802.3 in detail.
10 M

5 (a) Explain fragmentation and the fields related to fragmentation in IP datagram header. Discuss why IPV4 protocol needs to fragment some packets.
10 M
5 (b) Discuss queuing system classification. Explain M/M/1 queuing system.
10 M

6 (a) Explain the various fields in TCP header format.
10 M
6 (b) Find the shortest path between the source node 1 and and to all the other nodes for the network given below using Dijkstra's algorithm. Also draw the shortest path tree from node 1 to all other nodes.
10 M

Write short notes on :-
7 (a) Private IPV4 addresses.
10 M
7 (b) Looping in distance vector routing protocol.
10 M
7 (c) DHCP and RARP.
10 M



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