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Computer Networks And Communications Technology Question Paper

Computer Networks And Communications Technology

Course:Bachelor Of Computer Science (It Telecommunication)

Institution: Kabarak University question papers

Exam Year:2009

KABARAK
UNIVERSITY
EXAMINATIONS
2008/2009 ACADEMIC YEAR
FOR THE DEGREE OF BACHELOR OF BUSINESS MANAGEMENT
& INFORMATION TECHNOLOGY
COURSE CODE: BMIT 217
COURSE TITLE: COMPUTER NETWORKS AND
COMMUNICATIONS TECHNOLOGY
STREAM: Y2S1
DAY: MONDAY
TIME:
9.00
–
12.00
P.M.
DATE: 10/08/2009
INSTRUCTIONS:
1. This question paper has six questions
2. Answer question one and any other three questions
PLEASE TURN OVER
Page 1 of 4
QUESTION ONE (40 MARKS) COMPULSORY
(a) Explain the meaning of following terms
i.
Firewall
ii.
ISDN
iii.
Boot ROM
iv.
10Base5
v.
ASCII (10mks)
(b) Distinguish between
i.
Bluetooth and Wi-Fi
ii.
Data encryption and data decryption
iii.
Workgroup
and
domain
(6mks)
(c) For efficient largely trouble free networks, the following “5-4-3” rule is usually applied.
Explain
this
rule
(3mks)
(d) For each of the following IP addresses: 172.18.172.18 and 192.168.1.10
i. Identify the network class, network id, host id and correct sub netting
(4mks)
ii. Convert 172, 192 and 168 parts to binary number system
(6mks)
(e) Among the main three types of network topologies, star is a popular and widely used
topology in LANs. Explain four
reasons
why
you
think
so.
(4mks)
(f) List and explain three types of information that a routing table contains
(3mks)
(g) Draw a routing table for node C from the following network model for destinations A, B,
D
and
E
(4mks)
A
E
C
B
D
F
Page 2 of 4
QUESTION TWO (20 MARKS) ELECTIVE
(a) With the aid of a wave diagram, explain the distinction between pulse and cycle as used
in
digital
signals
in
data
transmission?
(3mks)
(b) Explain the importance of the following factors in computer networking
i. Bandwidth
ii. Synchronous and asynchronous transmission modes
iii. Multiplexing (6mks)
(c) Describe the three types of signal flaws giving the remedies of each
(6mks)
(d) The line below is a message sent over a network:
A network or communications network is a system of interconnected computers, telephones lines
or other communication devices to communicate and share applications and data. Data
transferred include; Voice, Sound, Image, Video and Text.
How long does it take to download this message using a 56k Modem if the system has a system
delay
of
2
milliseconds?
(5mks)
QUESTION THREE (20 MARKS) ELECTIVE
(a)
Differentiate
between
interior
and
exterior
routers
(3mks)
(b) Give
five
functions
of
a
Network
Operating
System
(5mks)
(c) Kabarak University wishes to establish a computer network across its three campuses
spread over Nakuru, Kericho and Eldoret towns to provide online learning to its students.
As a network expert, advice the institution on the following network issues giving
reasons for each.
i. The most suitable network type among LAN, MAN and WAN (4mks)
ii. At least four network hardware components needed to establish the
network (4mks)
iii. At least four software required for both the institution and the clients
(students) (4mks)
QUESTION FOUR (20 MARKS) ELECTIVE
(a) Before installation of a Network Operating System (NOS), one has to plan for the
installation.
Why
should
you
do
so?
(2mks)
(b) List four factors that must be considered before installing an NOS
(2mks)
Page 3 of 4
(c) During a network practical session a student set up a network of two computers by
connecting them using a straight through cable.
i. Describe how you can practically test that the computers can or cannot communicate
(3mks)
ii. Do you think that the two computers communicated?
Explain
(3mks)
(d) Describe how a crossover patch end cable is made
(10mks)
QUESTION FIVE (20 MARKS) ELECTIVE
(a) List six network issues that prompted ISO develop the OSI reference model
(3mks)
(b) Illustrate the difference between TCP/IP and OSI reference model layer systems (5mks)
(c) Describe
the
transport
layer
of
the
OSI
(4mks)
(d) For each of these four network issues: DHCP, NetBIOS, CSMA/CD and FDDI,
i.
Write
their
names
in
full
(2mks)
ii. Explain
their
functions
in
networking
(4mks)
iii. State the OSI reference model layer they operate at
(2mks)
Page 4 of 4

Computer Networks And Communications Technology Question Paper

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