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Computer Networks Question Paper

Computer Networks

Course:Bachelor Of Science In Information Technology

Institution: Masinde Muliro University Of Science And Technology question papers

Exam Year:2009

EXAMINATION FOR THE BACHELOR OF SCIENCE IN
INFORMATION TECHNOLOGY
COMPUTER NETWORKS
DATE: NOVEMBER 2009 TIME: 1½HOURS
INSTRUCTIONS: Answer any THREE questions
QUESTION ONE (20 MARKS)
a) A bus topology is a passive topology. Explain. (2 Marks)
b) An organization wants to install a LAN using either a hub or switch. Give some advice on why
a switch should be used instead of a hub. (4 Marks)
c) Describe the CSMA/CA access method, and state a network that uses it. (6 Marks)
d) Show, using diagrams, the difference between half-duplex and full duplex. (4 Marks)
e) Describe any FOUR types of servers found in a computer network. (4 Marks)
QUESTION TWO (20 MARKS)
a) List any FOUR functions of network interface card (NIC). (4 Marks)
b) An organization wants to install a LAN using cables. Explain the factors that it needs to consider in selecting the right cable. (6 Marks)
c) Explain the advantages of using a fibre optical cable in place of twisted pair. (4 Marks)
d) Identify any three functions done by the network layer in the OSI reference model. (3 Marks)
e) State three means of carrying signals in a wireless network. (3 Marks)
QUESTION THREE (20 MARKS)
a) Differentiate broadband transmission from baseband transmission. (4 Marks)
b) Discuss the following TCP/IP protocols.
i).IP (2 Marks)
ii).UDP (2 Marks)
iii).HTTP (2 Marks)
c) Why would an organisation prefer to use a star topology over the bus topology. (4 Marks)
d) Discuss the concept of connection-oriented and connectionless services as applied in computer
networks. ( 6 Marks)
QUESTION FOUR (20 MARKS)
a) Differentiate between packet switching and circuit switching. (4 Marks)
b) Differentiate the following terms used in computer networking, giving some examples
(i) Crosstalk and attenuation (4 Marks)
(ii) logical topology and physical topology (4 Marks)
c) Coaxial cables are classified into 10Base2 and 10Base5. State any major differences in the two.
(4 Marks)
d) Identify any FOUR situations where a server-based network is appropriate (4 Marks)
QUESTION FOUR (20 MARKS)
a) A repeater and a bridge are devices used in networking. Differentiate the two. (6 Marks)
b) Describe any FIVE advantages of peer-to-peer network compared to server based network.
(5 Marks)
c) Discuss any THREE types of networks based on coverage (size of network) (6 Marks)
d) Computer networks pass signals within the network through broadcasting, multicasting or
unicasting. Explain the three terms. (3 Marks)

Computer Networks Question Paper

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