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Introduction To Computer Networks (Cisy 131) (Bbit 241) (Dbit 223) (Dcis 121) 2Nd Trimester 2015 Question Paper

Introduction To Computer Networks (Cisy 131) (Bbit 241) (Dbit 223) (Dcis 121) 2Nd Trimester 2015

Course:Bachelor Of Business Information Technology

Institution: Kenya Methodist University question papers

Exam Year:2015

INTRODUCTION TO COMPUTER NETWORKS (CISY 131) (BBIT 241) (DBIT 223) (DCIS 121) 2ND TRIMESTER 2015
KENYA METHODIST UNIVERSITY

END OF 2'ND 'TRIMESTER 2015 (FT) EXAMINATION

FACULTY : COMPUTING & INFORMATICS
DEPARTMENT : COMPUTER SCIENCE & BUSINESS INFORMATION
UNIT CODE : BBIT 241/CISY 131/ DBIT 223/ DCIS 121
UNIT TITLE : INTRODUCTION TO COMPUTER NETWORKS
TIME : 2 HOURS

Instructions: Answer question one and any other two questions.

Question One

Describe the following terminologies as used in networking.
(6mks)
ARQ
NOS
UDP
Frame
Ssh
The internet has become a basic tool for communication today. Sketch with an appropriate diagram the role of the internet using a layered model protocol to facilitate this communication process.
(10mks)
What is a router? Discuss in details the layer which it operates on and state atleast one protocol that facilitates the process.
(5mks)
Discuss the concept behind ATM networks.
(5mks)
Provide one IEEE standard and give its strengths and weakness. (5mks)

Question Two

NIC is an important tool in networking. What is it? Provide two functions of NIC.
(5mks)
Identify and discuss three physical characteristics of fibre optic cables that make them more suitable for high speed digital data transmission than copper cables.
(6mks)
Explain the main functions of the protocols operating at the physical and transport layers of the ISO reference model.
(6mks)
What is a peer to peer network? Illustrate your answer.
(3mks)

Question Three

The data link layer has two sublayers. Identify the layers and discuss the functions performed by each of the sublayer.
(6mks)
What are open standards? Do we really need them?
(5mks)
Discuss the differences between multicasting and broadcasting. (5mks)
Explain why CSMA/CD requires a restriction on frame size for it to work.
(4mks)

Question Four

Discuss the GO back n technique and provide two benefits it has in telecommunication.
(5mks)
Network security is an essential role that a network administrator cannot overlook. Discuss how this role can be implemented in an organization of your choice.
(5mks)
Unbounded media is becoming the most popular media in telecommunications today. Discuss.
(10mks)
Unbounded media is becoming the most popular media in telecommunications today. Discuss.
(5mks)

Introduction To Computer Networks (Cisy 131) (Bbit 241) (Dbit 223) (Dcis 121) 2Nd Trimester 2015 Question Paper

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