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Bbit 242/Cisy 231: Telecommunication Networks Question Paper

Bbit 242/Cisy 231: Telecommunication Networks

Course:Computer Science And Business Information

Institution: Kenya Methodist University question papers

Exam Year:2012

KENYA METHODIST UNIVERSITY
END OF 2''ND ''TRIMESTER 2012 (DAY) EXAMINATIONS
FACULTY : COMPUTING AND INFORMATICS
DEPARTMENT : COMPUTER SCIENCE AND BUSINESS INFORMATION
UNIT CODE : BBIT 242/CISY 231
UNIT TITLE : TELECOMMUNICATION NETWORKS
TIME : 2 HOURS

Instructions:
Answer question one and any other two questions.
Questions one
Distinguish between the following:
(6mks)
Parallel and serial transmission
Synchronous and asynchronous transmission
Digital and analog
Describe the terms.
(4mks)
Band
Band rate
Differentiate between guided media and unguided media. (4mks)
Describe any two modes in which data can be transmitted across a transmission media.
(4mks)
Describe two international bodies that provide specifications for data transmission.
(4mks)
What is packet switching?
(2mks)
Outline any four advantages of packet switching technology. (4mks)
Differentiate between frequency division multiplexing and time division multiplexing.
(2mks)
Question Two
Compare and contrast between switch and router in context of their operation and functionally.
(6mks)
Describe the three switching techniques and outline the advantages and disadvantages of each.
(9mks)
Describe the ATM technology.
(5mks)
Question Three
When designing or updating a computer network, the selection of one type of media over another is an important issue. State and explain factors to consider in your decision.
(6mks)
Describe X.25
(4mks)
Distinguish between PSTN and PSDN technologies of data transmission.
(4mks)
A medium access protocol is part of the software that allows a workstation to place data unto the LAN. Depending on the networks topology, several types of protocols may be applicable. Explain the operation of CSMA/CD and token passing.
(6mks)
Question Four
Describe the concept of cyclic redundancy check (CRC) method transsion error correction.
(4mks)
State and explain the three methods of error control used with data communications.
(6mks)
Data communication can be transmitted on a number of technologies. Discuss the following techniques.
(10mks)
ATM
Point of point protocol
Frame relay
ADSL
FDDL
Question Five
Describe the following networks technology and discuss their significance.
(4mks)
VLANs (Virutal LANs)
Virtual private networks (VPN)
Describe tunnel creation and virtual private networks.
(2mks)
Distinguish between PSTN and PSDN data communication networks. (4mks)
Explain the following networkthreats and provide possible solutions of combating the problems.
(8mks)
Denial of service
Confidential breaches
Data diddling
State the specification of giga Ethernet.
(2mk)

Bbit 242/Cisy 231: Telecommunication Networks Question Paper

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