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Comp 222-Telecommunications And Computers Question Paper

Comp 222-Telecommunications And Computers

Course:Bachelor Of Computer Science (It Telecommunication)

Institution: Kabarak University question papers

Exam Year:2010

KABARAK UNIVERSITY
UNIVERSITY EXAMINATIONS
2009/20010 ACADEMIC YEAR
FOR THE DEGREE OF BACHELOR OF EDUCATION
SCIENCE
COURSE CODE: COMP 222
COURSE TITLE: TELECOMMUNICATIONS AND
COMPUTERS
STREAM: YEAR 2
DAY: FRIDAY
TIME: 9.00 – 11.00 A.M.
DATE: 13/08/2010

INSTRUCTIONS:
1. This question paper has FIVE questions
2. Answer question ONE and any other TWO question

QUESTION ONE (30 MARKS) COMPULSORY
(a) Explain the meaning of the following terms
i. Duplex transmission
ii. Full duplex transmission
iii. DSL
iv. Telecommunication (8mks)
(b) Distinguish between the following
i. Peer to peer and client-server networks
ii. A router and a gateway (4mks)
(c) List and explain six benefits of networks (6mks)
(d) Compare and contrast star and bus network topologies (4mks)
(e) Discuss at least 3 transmission flaws (3mks)
(f) Differentiate between analog and digital signals (3mks)
(g) Explain logical and physical topologies (2 mks)

QUESTION TWO (20 MARKS) ELECTIVE
(a) Distinguish between baud rate and bits rate? (2mks)
(b) Distinguish between data and signal giving an example of each (3mks)
(c) List and explain the steps that you should follow when sharing a folder across a network
(8 mrks)
c) Discuss the following terms into details:-
i) Packet switching (3.5 marks)
ii) Circuit switching (3.5 marks)

QUESTION THREE (20 MARKS)
(a) What is Private Branch Exchange (PBX) telephone systems (2mks)
(b) Describe the components that make PBX (8mks)
(c) Explain the functions of a PBX system (4mks)
(d) Discuss Hosted PBX, IP-PBX and mobile PBX giving at least one advantage and
one disadvantage of each (6mks)

QUESTION FOUR (20 MARKS)
(a) What is MODEM (2mks)
(b) Digital signals are preferred over analog signals in data transmissions over computer
networks. Give two reasons for this. (2mks)
(c) Explain the following :-
i).Unicast
ii).serial transmission
ii) Throughput (6mks)
(d) Describe how a MODEM functions in modulating and demodulating signals
(4mks)
(e) In modulating of signals, a MODEM codes a binary digit 1 as compressions and a binary
digit 0 as rarefactions. Sketch an analog signal that results from the following digital
signal (6mks)
V(v)
t(s)

QUESTION FIVE (20 MARKS)
(a) Describe hybrid topology (3marks)
(b) Discuss the OSI reference model (8mks)
(a) For each of the following protocols, write their names in full, outline their functions and
state the OSI reference model layer they operate
i. TCP
ii. FTP
iii. UDP (9mks)

Comp 222-Telecommunications And Computers Question Paper

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