Punjab University 2008 Post Graduate Diploma Computer Application Comter Networks & data communication - Question Paper

DECEMBER examination - 2008
Class : PGDCA
Subject : Computer Networks & Data Communication
Time : three hrs
M.M. : 100

Note : Attempt five ques. in all with any two every from part A & B. part C is complusory.


part - A


1. a) describe Computer network. explain basic hardware and software requirements for establishing computer network. [Marks 10]

b) What is Multiplexing ? discuss FDM and TDM. provide suitable examples. [Marks 10]


2. a) Expalin Synchronous and Asynchronous modulation. [Marks 10]

b) discuss the network structure and architecture. [Marks 10]


3. a) describe switching. Compare the performance of circuit switching & packet switching. [Marks 10]

b) What is the working principle of fibre optics and copper wire.[Marks 10]


4. a) Write down the difference ranging from base brand and broad band Coaxial Cable. [Marks 10]

b) What is data communication ? discuss Analog Vs Digital Communication. [Marks 10]



part - B


5. a) describe data link layer. explain the functions of data link layer. [Marks 10]

b) explain the design problems for Data base. [Marks 10]


6. What is routing ? explain the algorithms for routing in details. [Marks 20]

7. What is congestion ? discuss the congestion control Algorithms. [Marks 20]

8. discuss the modulation techniques in respect with AM, PM, FM. [Marks 20]


part - C


9. a) Difference ranging from Protocol and Interface.

b) discuss Ring Topology & star Topology.

c) What is datagram.

d) Brief apllication of network.

e) describe congestion [Marks 5x4=20]

Earning:   Approval pending.