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Telecommunication Networks (Bbit 242) (Cisy 231) 2Nd Trimester 2014 Question Paper

Telecommunication Networks (Bbit 242) (Cisy 231) 2Nd Trimester 2014

Course:Bachelor Of Business Information Technology

Institution: Kenya Methodist University question papers

Exam Year:2014

TELECOM NETWORKS (BBIT 242) (CISY 231) 2ND TRIMESTER 2014
KENYA METHODIST UNIVERSITY

END OF 2'ND 'TRIMESTER 2014 (PT) EXAMINATION

FACULTY : COMPUTING & INFORMATICS
DEPARTMENT : COMPUTER SCIENCE AND BUSINESS
INFORMATION
UNIT CODE : BBIT 242/CISY 231
UNIT TITLE : TELECOM NETWORKS
TIME : 2 HOURS

INSTRUCTIONS

Answer question one and any other two questions

SECTION A (COMPULSORY)

Question One

Differentiate between the following
(6 marks)
Parallel and serial transmission
Synchronous and asynchronous transmission

Digital and analog
Describe the following terms
(4 marks)
Baud
Baud rate
Differentiate between parallel and serial transmission
(4 Marks)
Describe any two modes in which data can be transmitted across a transmission media
(4 Marks)
Name two international bodies that provide specifications for data transmission
(4 Marks)
Describe packet switching
(4 marks)
Outline any four advantages of packet switching technology
(4 marks)
Differentiate between frequency division multiplexing (FDM) and time division Multiplexing (TDM)
(2 marks)
SECTION B

Question Two

State and briefly explain the three properties of analog signal used in data encoding
(6 Marks)
Digital transmission systems are more preferred to their analog counterparts. Briefly explain why?
(4 marks)
Describe wavelength Division multiplexity stating how it differs from Frequency Division Multiplexity
(4 Marks)
With the help of an appropriate example describe the pulse code modulation scheme for encoding analog data over a digital carrier signal
(6 marks)
Question Three

State and briefly explain the three data transmission modes, with respect to the direction of data flow
(6 marks)
Using a valid example, describe how a checksum is used for error detection on transmission systems
(10 marks)
Distinguish between synchronous and asynchronous transmission systems
(4 marks)
Question Four

Briefly describe the role played by data compression in communication networks
(4 Marks)
Outline three factors that may affect successful translation of a signal at the destruction system
(3 Marks)
Briefly describe the three types of errors in telecommunications, giving an example in each case
(9 Marks)
Distinguish between FDDI and CDDI technologies for ring based networks
(4 Marks)

Telecommunication Networks (Bbit 242) (Cisy 231) 2Nd Trimester 2014 Question Paper

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