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Telecommunication Network (Bbit 242) (Cisy 231) 1St Trimester 2017 Question Paper

Telecommunication Network (Bbit 242) (Cisy 231) 1St Trimester 2017

Course:Bachelor Of Business Information Technology

Institution: Kenya Methodist University question papers

Exam Year:2017

TELECOMMUNICATION NETWORK (BBIT 242) (CISY 231) 1ST TRIMESTER 2017 FT
KENYA METHODIST UNIVERSITY

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

SCHOOL : SCIENCE AND TECHNOLOGY
DEPARTMENT : COMPUTER SCIENCE
UNIT CODE : BBIT 242/CISY 231
UNIT TITLE : TELECOMMUNICATION NETWORK
TIME : 2 HOURS

Instructions:

Answer all questions in SECTION A and ANY TWO questions in SECTION B
Question One

a. Define the term multiplexing (2 marks)

b. Describe the role of a modem by describing the modulation and demodulation process. (4marks)
c. Define the term Parity check bit and briefly explain how the Even Parity and odd Parity checks work. (5 marks)
d. List two advantages of data compression across a network. (4 marks)
e. Differentiate between the checksum error detection technique and the CRC error detection technique. (4 marks)
f. List four functions of a telephone set. (4 marks)
g. Briefly describe two advantages of ISDN. (4 marks)
h. List three places where X25 is used. (3 marks)
SECTION B (ANSWER ANY TWO QUESTIONS FROM THIS SECTION)

Question Two

Mobile telecommunication has grown in importance and its use has steadily increased in Kenya. With different mobile telecommunication commanding different market shares in the country. Discuss the reasons behind the growth of Mobile Telephony in Kenya.
(10 marks)

The development of Mobile Telecommunication has seen the 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 Two

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:

a. Huffman coding. (8 marks)
b. Run length encoding. (6 marks)

c. Explain the following terms as related to compression.
i. Spatial compression. (3 marks)
ii. Temporal compression. (3 marks)
Question Four

Explain the following network threats and provide possible solutions of combating the problem.
(8 marks)
i) Denial of service
ii) Confidential breaches
iii) Data Diddling

b. State the specification of giga Ethernet. (2 marks)
c. Distinguish between PSTN and PSDN technologies of data transmission (4 marks)
d. Describe the following wireless telecommunication technologies (6 marks)
Microwave
Cellular radio technology
Satellite

Telecommunication Network (Bbit 242) (Cisy 231) 1St Trimester 2017 Question Paper

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