POKHARA UNIVERSITY
Level: Bachelor Semester – Fall Year : 2005
Programme: BE Full Marks: 100
Course: Computer Networks Time : 3hrs.
Candidates are required to give their answers in their own words as far as practicable.
The figures in the margin indicate full marks.
Attempt all the questions.
1. a) Explain different type of data encoding and error checking technique used in data transmission.7
b) What are the service primitives? Sketch and explain the seven-layer OSI model? 8
2. a) What is meant by network topology? List the various topologies with advantages and disadvantages for constructing the network.8
b) Explain the use of Medium Access Control and Logical Link Control over LAN architecture.7
3. a) What do you mean by flow control? Explain the mechanism for flow control.8
b) Describe the various Internet Address Classes with e.g. 7
4. a) What is Routing Metrics? Explain different protocols used by Interior Gateway Protocols and Exterior Gateway Protocols of IP-Routing Protocols.8
b) Write down the difference between HDLC and SDLC while considering different field in their frame format.7
5. a) How is public key encryption method different from symmetric key? Explain Data Encryption Standard OR RSA algorithm for encryption / decryption.8
b) Explain with the help of the frame format the User defined Datagram And Transmission control protocol.7
6. a) List out the different method used to provide the network security.Which one is the best suited? Why?8
b) Explain the different types of Function regarding to connection-oriented and connectionless Services?7
7. Write short notes on (Any Two)2×5
a) Selective Flooding
b) SNMP
c) Client/ Server Architecture
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