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Bmit 329: Data Communication And Networks Question Paper

Bmit 329: Data Communication And Networks

Course:Bachelor Of Business Management And Information Technology

Institution: Kabarak University question papers

Exam Year:2010

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

INSTRUCTIONS:
Answer Question ONE and Any Other THREE

QUESTION ONE : 40 marks.

a). What is Data communication? [2 marks]

b). what is a hotspot? [1 mark]

c).Discuss a 3-layer network model explaining clearly how data moves from one layer to
another with aid of a well labelled diagram. [5 marks]
d) Define Communication channel [1 mark]
e) What is WiMax? Explain the advantages of WiMax over WiFi [6 marks]

f). Discuss various transmission impairments and how they may affect the information
carrying capacity of a communication link. [3 marks]

g).Explain the following:-
a) Phase modulation [1 mark]
b) Bandwidth [1 mark]
c) SAP’s [1 mark]
d) Bit rate [1 mark]
h). Differentiate between serial and parallel transmission . [2 marks]

i). Discuss at least five design issues for layers [6 marks]
j). Differentiate between a protocol and an interface in regard to data communication
[4 marks]
k)Your are called upon to set up a peer-to-peer connection. One of the computer’s IP
address is 175.168.125.10 and another node’s IP address is 193.128.16.10.
i. Describe the steps in configuration of the IP address 193.128.16.10
[2marks]

ii . Do you think that the two computers communicated? Explain
[2marks]

l). ) What are 3 factors in any network which could cause congestion? [4 marks]

QUESTION TWO: 20 MARKS

a) What is the difference between Switching and Routing [2 marks]
b) Discuss the two (CSMA) carrier sense multiple access protocols [6 marks]
c) What is a Packet Sniffer [1 mark]
d) What is meant by the term network security? [1 mark]
e) Discuss types and sources of security threats in a network. [6 mark]
f). Discuss all the six basic hardware components used in construction of any network.
[4 marks]

QUESTION THREE:20 MARKS

a) Explain the three classes of Bluetooth radio transceivers [5 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 [3 marks]
d) Explain “token“as data link protocol [2 marks]
e) Discuss packet switching and circuit switching bringing out the advantages of each of
the other. [7 marks]
f). what is protocol data unit (PDU)? [2 marks]

QUESTION FOUR: 20 MARKS

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

ii) Discuss OSI reference Model in brief [6 marks]
iii) Explain the TCP functions in a network [4 marks]

QUESTION FIVE: 20 MARKS

a) What is Network architecture? [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]

Bmit 329: Data Communication And Networks Question Paper

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