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Cisy 131:Computer Networks Question Paper

Cisy 131:Computer Networks

Course:Computer Information Systems

Institution: Kenya Methodist University question papers

Exam Year:2012

KENYA METHODIST UNIVERSITY

END OF 2''ND ''TRIMESTER 2012 (SCHOOLBASED) EXAMINATIONS
FACULTY : EDUCATION AND SOCIAL SCIENCES
DEPARTMENT : EDUCATION
UNIT CODE : CISY 131
UNIT TITLE : COMPUTER NETWORKS
TIME : 2 HOURS

INSTRUCTIONS

Answer question one and two other questions.

Question One

Write the main reasons of the emergence of computer networks.

(4 Marks)

What is the purpose of protocols in computer communication?

(4 Marks)

State the elements of computer network and give an example of each.

(5 Marks)

Explain the purpose of the OSI model in computer communications citing the main purpose of the model.

(4 Marks)

Using a diagram explain the functions of the layer OSI model.

(14 Marks)

Question Two

Identify three standards bodies and explain their role in computer communication stands selling.

(6 Marks)

Identify the role of the TCP/IP protocol in the internet communications.

(4 Marks)

Illustrate the layers of the internet protocol citing the purpose of each.

(10 Marks)

Question Three

Compare between the open and closed standards.

(4 Marks)

What is the main role of IP in the computer communication?

(2 Marks)

Compare between IPv4 and IPv6.

(6 Marks)

What are the advantages of a hierarchical address over a flat address?

(4 Marks)

Compare the following media access methods:

Contention and polling.

(4 Marks)

Question Four

With the help of an example distinguish between logical and physical topology.

(4 Marks)

What are the main advantages and disadvantages of radio wave as medium of computer networking?

(8 Marks)

Describe any four WAN standards.

(8 Marks)

Question Five

What is the main difference between a switch and a Bridge?

(4 Marks)

What is the main challenge of mesh topology?

(2 Marks)

Comment on security of wireless and guided media, suggesting remedial measures for each in case of insecurity.

(8 Marks)

Cisy 131:Computer Networks Question Paper

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