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Data Communication And Networks Question Paper

Data Communication And Networks

Course:Bmit

Institution: Kabarak University question papers

Exam Year:2009

COURSE CODE: BMIT 329
COURSE TITLE: DATA COMMUNICATION AND NETWORKS
STREAM: Y3S2 & Y4S1

INSTRUCTIONS:
1. Question ONE is compulsory
2. Answer any other THREE questions

SECTION A: 40 marks.

1. What is Data communication? 2 marks

2. Define Communication channel. 2 marks

3. “Performance of network depends on the channel”. Discuss it with different
transmission media. 5 marks

4. Differentiate between a protocol and an interface in regard to data communication
4 marks
5. Discuss various transmission impairments and how they may affect the information
carrying capacity of a communication link. 9 marks

6. Explain the following:-
a) Synchronous Transmission. 3.5 marks
b) Asynchronous Transmission 3.5 marks
c) Ethernet 2 marks
7. Discuss any two types of errors that occur during digital transmission. 2 marks

8. Explain the various Network topologies with aid of neat diagrams in each case
7 marks.

SECTION B (20 MARKS EACH)

CHOOSE ANY THREE

9. a) Distinguish between Internet and intranet 3 marks

b) Discuss all the six basic hardware components used in construction of any network.
9 marks
c) Discuss the two (CSMA) carrier sense multiple access protocols 7 marks
d) What is a Packet sniffer 1 mark.

10. a) Define a packet in relation to data communication 1 mark
b) Write notes on the following:
i) Packet switching 4 marks
ii) Circuit switching. 4 marks
iii) Outline the advantages of packet switching over circuit switching 3 marks

b) What is the significance of packet size in a packet switching network? 2marks
i) Explain the difference between datagram and virtual circuit operation 4 marks
ii) Explain “token“as data link protocol 4 marks

11. i) Define routing? 1 mark
ii) Discuss Shortest path and flow based routing algorithms 9 marks
iii) Describe the various elements of Transport layer 6 marks
iv) Explain the TCP functions in a network 4 marks

12. i) Discuss the following:- 9 marks
a) HTTP
b) WWW
c) DNS
ii) Define guided and unguided transmission media and thoroughly explainining
the relevant examples in each case. use drawing where applicable 11 marks

13. i) Comment on the term “Network security” 2 marks
ii) List four factors that computer and network security addresses 4 marks
iii) Explain the various security measures used to protect the networks 7 marks
iv) What is ALOHA system? Write the basic characteristics of pure ALOHA and
slotted ALOHA 7 marks

Data Communication And Networks Question Paper

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