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Cisy 231:Telecommunication Networks Question Paper

Cisy 231:Telecommunication Networks

Course:Computer Science

Institution: Kenya Methodist University question papers

Exam Year:2012

KENYA METHODIST UNIVERSITY

END OF 2ND TRIMESTER 2012 (EVENING) EXAMINATIONS
FACULTY : COMPUTING & INFORMATICS
DEPARTMENT : COMPUTER SCIENCE & BUSINESS INFORMATION
UNIT CODE : BBIT 242/CISY 231
UNIT TITLE : TELECOMMUNICATION NETWORKS
TIME : 2 HOURS

Instructions: Answer ALL Questions in SECTION A and Any TWO Questions in Section B.

Question One (30 Marks)

Define the term multiplexing.

(2 Marks)

Describe the role of a modem by describing the modulation process.

(4 Marks)

Define the term parity check and briefly explain how even parity and odd parity checks work.

(5 Marks)

List TWO advantages of data compression across a network.

(4 Marks)

Differentiate between the check sum error detection technique and the CRC error detection technique.

(4 Marks)

List FOUR functions of a telephone set.

(4 Marks)

Briefly describe TWO advantages of ISDN.

(4 Marks)

List THREE places where X25 is used.

(3 Marks)

SECTIN B (Answer any TWO Questions)

Question Two

Mobile telecommunication has grown in importance and it’s use has steadily increased in Kenya with different mobile telecommunication commanding different market shares in the country. Discuss reason’s behind the growth of mobile telephone in Kenya.

(10 Marks)

The development of Mobile telecommunication has seen emergence of mobile number portability (MNP) in Kenya. Study the industry trends in MNP in Kenya and come up with challenges facing MNP, from your challenges recommend solutions to make MNP a success in Kenya.

(10 Marks)

Question Three

Compression aims to achieve various aims in multimedia. Methods include lossy and lossless compression methods. Describe the following compression methods; you may use examples to illustrate your answers:

Huffman Coding.

(5 Marks)
(ii) Run Length Encoding (5 Marks)

Explain the following terms as related to compression;

(i) Spatial compression (5 Marks)
(ii) Temporal compression (5 Marks)

Question Four

Explain the following network threats and provide possible solutions of combating the problem.

(8 Marks)

Denial of service

(ii) Confidential breaches

(iii) Data diddling

State the specification of giga Ethernet.

(2 Marks)

Distinguish between PSTN and PDN technologies of data transmission.

(4 Marks)

Describe the following wireless telecommunication technologies.

(6 Marks)

(i) Microwave

(ii) Celleluar radio technology

(iii) Satellite

Cisy 231:Telecommunication Networks Question Paper

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