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Computer Networks (Bbit 241) (Cisy 131) (Misc 434) ( Bict 323) ( Dbit 223 ) (Dcis 121) 1St Trimester 2017 Question Paper

Computer Networks (Bbit 241) (Cisy 131) (Misc 434) ( Bict 323) ( Dbit 223 ) (Dcis 121) 1St Trimester 2017

Course:Bachelor Of Business Information Technology

Institution: Kenya Methodist University question papers

Exam Year:2017

COMPUTER NETWORKS (BBIT 241) (CISY 131) (MISC 434) ( BICT 323) ( DBIT 223 ) (DCIS 121) 1ST TRIMESTER 2017 FT
KENYA METHODIST UNIVERSITY

END OF 1'ST 'TRIMESTER 2017 (FT) EXAMINATION

SCHOOL : SCIENCE AND TECHNOLOGY
DEPARTMENT : COMPUTER SCIENCE
UNIT CODE : 'CISY 231/BBIT 241/ MISC 434/ BICT 323/ DBIT 223/ DCIS 121
UNIT TITLE : 'COMPUTER NETWORKS
TIME : 2 HOURS

Instructions:

INSTRUCTIONS: Answer question one and any other two questions

Question One

a) In a small scale LAN, a computer is connected to a LAN switch, the LAN switch is then connected to a router and the router is connected to a second LAN switch. A server is then connected to this second switch. Explain its functions:

Modem
The LAN switches
Hub
The router
Brouter
(10marks)
b) Identify and explain error that arise during data Communication (8 marks)

(c) Describe the general behavior of the CSMA/CD algorithm used to control media access within an Ethernet. (6 marks)
(d) Explain Message switching and packet switching techniques and describe the advantages and disadvantages of packet-switching technique has over the circuit-switching technique? (6 marks)
Question Two

Briefly explain the importance of the OSI model.
(6 marks)
Compare the OSI reference model and the 5-layer Internet reference model. Identify what is different between these two models
(8 marks)
Describe client server computing.
(2 marks)
Explain the differences between UDP and TCP.
(4marks)
Question Three

What is frame relay and why is it preferred to X.25 packet-switching service in wide area networks?
(8 marks)
Explain the disadvantages of using wireless communication in networking applications.
(4 marks)
What is a MAC address?
( 2 marks)
Explain, giving reasons, what network device/s you would use in each of the following cases:
Linking a LAN in a building to another LAN in the next building so that data frames can be selectively be forwarded from one LAN to another.
Linking a LAN in a building to another LAN in a building situated at the other side of a field.
(6 marks)
Question Four

Name two standards created by IETF, name two standards created by IEEE.
( 2 marks)
Briefly explain the features of the Data Link Layer.
(3 marks)
Explain how a router enables a computer network to function efficiently. (4 marks)
Briefly explain the elements of s computer network
( 5 marks)
Describe some of the computer communication errors
( 6 marks)

Computer Networks (Bbit 241) (Cisy 131) (Misc 434) ( Bict 323) ( Dbit 223 ) (Dcis 121) 1St Trimester 2017 Question Paper

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