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Bit 4302 Telecommunications Question Paper
Bit 4302 Telecommunications
Course:Bachelor Of Science In Information Technology
Institution: Kca University question papers
Exam Year:2014
UNIVERSITY EXAMINATIONS: 2013/2014
ORDINARY EXAMINATION FOR THE BACHELOR OF SCIENCE
IN INFORMATION TECHNOLOGY
BIT 4302 TELECOMMUNICATIONS
DATE: AUGUST, 2014
TIME: 2 HOURS
INSTRUCTIONS: Answer Question ONE and any other TWO
QUESTION ONE
a) With the aid of a relevant diagram describe a basic duplex telecommunication system.
(5 Marks)
b) (i) State the Nyquist sampling theorem.
(2 Marks)
(ii) Explain why a digital channel is designed to run at 64 Kbps.
c) Compare and contrast FDMA and TDMA.
(2 Marks)
(6 Marks)
d) Define the following terminologies in relation to satellite communications:
(i) Earth Stations (1 Mark)
(ii) Uplink (1 Mark)
(ii) Downlink (1 Mark)
(iii) Transponder (1 Mark)
(v) Elevation angle (1 Mark)
e) The development of communications-based applications which are the foundation of
our modern society involves many trade-offs in terms of the use of different types of
communications facilities, types of terminal devices, hours of operation and other
constraints. Four of the key constraints associated with the development of
communications applications are throughput, response time, bandwidth and
economics. Discuss how each of these constraints affect communication.
(8 Marks)
1
f)
Describe briefly how synchronous transmission mechanisms are conducted.
(2 Marks)
QUESTION TWO
a)
Describe briefly any six desired features of a good message-passing system
6 Marks
b) Describe the two levels of ISDN services (BRI and PRI). 7 Marks
c) Describe briefly any four components of a VoIP network. 4 Marks
d) Briefly discuss the characteristics of a good data communication system.
(3 Marks)
QUESTION THREE
a)
State the functions of any six of the most widely known and implemented TCP/IP
application layer protocols.
b)
(6 Marks)
Telecommunications facilities in the world are systematically being upgraded
from analog to digital facilities. Discuss the reasons behind this very significant
movement. (5 Marks)
c) Describe the causes of and solutions for jitter in VoIP networks. (6 Marks)
d). State the following basic features of GSM: (i) Access method (1 Mark)
(ii) BS transmission band (1 Mark)
(iii) MU transmission band (1 Mark)
QUESTION FOUR
a)
How can network administrators accelerate the packet dispatching for delay-
sensitive flows?
b)
(6 Marks)
Discuss the importance of telecommunications and computer networks in today’s
business.
c)
(6 Marks)
With the aid of diagrams, given the bit stream below, encode it using:
(i) Non-Return to Zero-Inverted (2 Marks)
(ii) Manchester (3 Marks)
2
(iii)
Differential Machester
1
1
(3 Marks)
0
0
1
0
1
0
QUESTION FIVE
a)
(i) Define the term convergences used in Computer networks. (1 Mark)
(ii) Converged networks have existed for a while now, but were only feasible
in large enterprise organizations. Why?
(iii)
Why is it difficult for some organizations to make a decision to move
towards converged networks?
b)
(2 Marks)
With the aid of relevant diagrams, describe the principal components of a digital
communication system.
c)
(4 Marks)
(9 Marks)
The WAN access physical layer describes the physical connection between the
company network and the service provider network. Describe the following as
commonly used to describe physical WAN connections:
(i) CPE (2 Marks)
(ii) DCE (2 Marks)
3
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