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Bbit 103 Bit 1305 Computer Networks Question Paper
Bbit 103 Bit 1305 Computer Networks
Course:Bachelor Of Business Information Technology
Institution: Kca University question papers
Exam Year:2014
UNIVERSITY EXAMINATIONS: 2013/2014
ORDINARY EXAMINATION FOR THE BACHELOR OF SCIENCE
IN INFORMATION TECHNOLOGY&BUSINESS INFORMATION
TECHNLOGY
BBIT 103 BIT 1305 COMPUTER NETWORKS
DATE: AUGUST, 2014
TIME: 2 HOURS
INSTRUCTIONS: Answer Question ONE and any other TWO
QUESTION ONE: 30 MARKS-COMPULSORY
(a)(i) Distinguish between CSMA/CD and CSMA/CA.
(ii) Where are they applied?
[4 Marks]
[2 Marks]
(b) Briefly describe two similarities and two differences between switches and routers.
[4 Marks]
(c)
Briefly discuss the three (3) fundamental characteristics of a data communication
system.
(d)
[3 Marks]
Briefly discuss any three (3) benefits of the OSI Reference Model. [6 Marks]
(e)(i) Which class does the IPv4 address 130.248.45.89 belong to? Show your working.
[2 Mark]
(ii) What is the Network ID for this IP address?
(f)
[1 Mark]
Contrast the following:
i). Circuit switching and Packet switching. ii). Single mode and Multimode fiber.
(g)
[2 Marks]
[2 Marks]
A network topology is a physical layout of the network. Discuss the following
topologies, using appropriate diagrams: Bus and Ring.
1
[4 Marks]
QUESTION TWO
(a)
(b)
(c)
List four (4) functions that are performed by a Network Interface Card (NIC).
[4 Marks]
As a network administrator, you have two options when it comes to assigning IP
addresses to the hosts in your network. Briefly explain:
(i)
When it is appropriate to use Static IP configuration option.
[4 Marks]
(ii)
When it is appropriate to use Dynamic IP configuration option.
[4 Marks]
Discuss briefly four (4) factors that must be taken into account when deciding
what type of Network Operating System to install on a network. [8 Marks]
QUESTION THREE
(a)
You and your friend wish to transfer huge files between your two laptops. It
would take a lot of time to accomplish this task if you decided to use a memory
stick. Your friend asks you to set a simple peer-to-peer network to achieve the
objective.
(i) What equipment do you require to accomplish this task?
[4 Marks]
(ii) What type of transmission media would you use?
[1 Mark]
(iii) What type of cable will you construct?
[1 Mark]
(iv) Which network troubleshooting commands are you likely to use in this
task?
(v)
[2 Marks]
How will you set up the simple peer-to-peer network of the two laptops?
[2 Marks]
(vi)
(b)
What configurations are necessary for this task to be accomplishment?
[4 Marks]
Differentiate between the following terminologies as used in computer networks:
(i)
Broadband and Baseband signaling.
[2 Marks]
(ii)
Half duplex and full duplex transmission.
[2 Marks]
(iii) Impulse and Thermal noise.
[2 Marks]
QUESTION FOUR
(a)
Internet services often use the so-called client server paradigm. New ad-hoc
networks, on the other hand, use peer-to-peer services. Compare these two ways
2
(b)
(c)
(d)
and give examples of services or applications. Explain the benefits, drawbacks,
and problems of both paradigms.
[6 Marks]
List and briefly explain any three (3) things that computer networks provide to
people.
[6 Marks]
Describe the steps a client goes through to get an IP address from a DHCP server.
[6 Marks]
Explain any two (2) possible sources of noise in cables.
[2 Marks]
QUESTION FIVE
(a)
(b)
(c)
(d)
(e)
Explain how wireless LANs communicate.
Explain why the Four Repeater Rule is important.
Outline the five (5) components of a data communication system.
Describe briefly the three components of a fiber optic cable.
Briefly discuss any two (2) functions of a Network Administrator.
3
[6 Marks]
[3 Marks]
[5 Marks]
[3 Marks]
[3 Marks]
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