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Data Communication And Networks 2009/2010 Academic Year Question Paper

Data Communication And Networks 2009/2010 Academic Year

Course:Bmit

Institution: Kabarak University question papers

Exam Year:2010

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

INSTRUCTIONS:
1. SECTION A is COMPULSORY and has 40 marks.
2. Attempt any THREE questions from SECTION B. Each question has 20 marks.

SECTION A

QUESTION ONE: 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. 6 marks

6. Explain the following:-
a) Synchronous Transmission. 2 marks
b) Frequency Division Mulplexing 2 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
6 marks
9. What is WiMax ?explain the advantages of WiMax over WiFi 7 marks

SECTION B

QUESTION TWO: 20 MARKS

a) Discuss all the six basic hardware components used in construction of any network.
6 marks
b) Discuss the two (CSMA) carrier sense multiple access protocols 6 marks
c) What is a Packet sniffer 1 mark
d) Discuss the WIFI standards 7 marks

QUESTION THREE: 20 MARKS

a) Discuss packet switching and circuit switching bringing out the advantages of
each of the other. 7 marks
b) What is the significance of packet size in a packet switching network? 1 mark
c) Explain the difference between datagram and virtual circuit operation 5 marks
d) Explain “token“as data link protocol 2 marks Page 3 of 3

e) Explain the three classes of Bluetooth radio transceivers 5 marks

QUESTION FOUR: 20 MARKS

a) Discuss the following terms into details:-
i) 1-persistent CSMA
ii) P-persistent CSMA
iii) Nonpersistent CSMA 10 marks

b) Discuss OSI reference Model in brief 6 marks
c) Explain the TCP functions in a network 4 marks

QUESTION FIVE: 20 MARKS

a) What is a hotspots 1 mark
b) Explain how slotted ALOHA and pure ALOHA works? 8 marks
c) Clearly bring out the difference in performance between slotted and pure
ALOHA with aid of a good labelled graph 3 marks
d) Discuss all types of networks 6 marks
e) Briefly explain infrared Technology 2 marks

Data Communication And Networks 2009/2010 Academic Year Question Paper

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