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Computer Networks Question Paper

Computer Networks

Course:Bachelor Of Science In Information Technology

Institution: Kca University question papers

Exam Year:2009

UNIVERSITY EXAMINATIONS: 2008/2009
FIRST YEAR EXAMINATION FOR THE DEGREE OF BACHELOR OF
SCIENCE IN INFORMATION TECHNOLOGY
BIT 1305: COMPUTER NETWORKS
DATE: AUGUST 2009 TIME: 2 HOURS
INSTRUCTIONS: Answer question ONE and any other TWO questions
QUESTION ONE
(a) Describe any FIVE basic components of a network with their functions. (5 Marks)
(b) Explain any FOUR functions of network interface card (NIC). (4 Marks)
(c) Differentiate the two types of coaxial cables. (6 Marks)
(d) XYZ company wants to install a network and is in the process of selecting an appropriate
topology. State any FOUR reasons why the organization would opt to use a star topology
(4 Marks)
(e) Explain the major function of each of the seven layers of the OSI reference model. (7 Marks)
(f) Explain any four reasons why TCP/IP is suited for implementations of intranets and extranets.
(4 Marks)
QUESTION TWO
(a) (i) What is a network operating system? (2 Marks)
(ii) Give any FOUR functions of a network operating system (4 Marks)
(b) Describe any FIVE types of servers found in a computer network. (5 Marks)
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(c) You are requested to configure a TCP/IP network which is currently unable to share the
resources among the computers and access the network. Describe the area which you need to
look into. (4 Marks)
(d) Describe the half-duplex (CSMA/CD) access method, and state a network that uses it.
(5 Marks)
QUESTION THREE
(a) (i) What do you understand by guided and unguided communication media. (2 Marks)
(ii) Identify THREE categories of each. (3 Marks)
(b) Identify ONE advantage and ONE disadvantage of using twisted pair over coaxial cable.
(1 Mark)
(c) Compare twisted pair cable and fiber optic cable based on following factors:
(i) Cost
(ii) Installation
(iii)Bandwidth capacity
(iv) Attenuation
(v) EMI
(5 Marks)
(d) Describe the major components of an optical transmission system. (3 Marks)
(e) Discuss the concept of connection-oriented and connectionless services as applied in computer
networks. (6 Marks)
QUESTION FOUR
(a) Differentiate the following terms used in computer networking, giving some examples
(i) active topology and passive topology (4 Marks)
(ii) logical topology and physical topology (4 Marks)
(b) Compare the star and the bus topologies based on following factors:
(i) Ease of expansion
(ii) Ease in troubleshooting
(iii) ease of failure
(iv) Cost
(4 Marks)
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(c) Explain the token passing mechanism in ring topology (4 Marks)
(d) Identify any FOUR situations where a server-based network is appropriate (4 Marks)
QUESTION FIVE
a) Compare a bridge and a router based on the following factors
(i) OSI layer(s) they exist in
(ii) kind of protocols dealt with
(iii) types of networks that they can connect together.
(3 Marks)
b) Describe any FIVE advantages of peer-to-peer network compared to server based network.
(5 Marks)
c) Computer networks can be classified based on transmission technology as broadcasts networks and
point-to-point networks.
(i) Define the following terms as used in broadcasting networks
• Broadcasting
• unicasting
• multicasting (3 Marks)
(ii) Point-to-point networks may be packet switched or circuit switched. Explain.
(6 Marks)
d) Discuss the three private IP address classes which organizations can use for their LANs.
(3 Marks)

Computer Networks Question Paper

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