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Computer Networks Question Paper

Computer Networks

Course:Bachelor Of Science In Information Technology

Institution: Kca University question papers

Exam Year:2009

UNIVERSITY EXAMINATIONS: 2009/2010
FIRST YEAR EXAMINATION FOR THE DEGREE OF BACHELOR OF
SCIENCE IN INFORMATION TECHNOLOGY
BIT 1305: COMPUTER NETWORKS
DATE: NOVEMBER 2009 TIME: 2 HOURS
INSTRUCTIONS: Answer question ONE and any other TWO questions
QUESTION ONE
a) List five major characteristics of a LAN [5 Marks]
b) Fibre optics has become common in implementations of computer networks. Discuss the
advantages associated with this medium. [4 Marks]
c) Explain any five routing metrics used by routing protocols to determine the best path for a packet.
[5 Marks]
d) The MAC address for your PC NIC is: 36-1D-B3-A1-F8-24. What is the address of the OUI
portion of this NIC card, expressed as a binary number? [5 Marks]
e) Define the following terminologies as used in computer networks:
(i) Metropolitan Area Network (MAN) [1 Mark]
(ii) Virtual Private Network (VPN) [1 Mark]
(iii) Throughput [1 Mark]
(iv) Packet [1 Mark]
(v) Digital bandwidth [1 Mark]
f) Describe simplex, half-duplex and full duplex transmission. [6 Marks]
QUESTION TWO
a) Explain any six different ways in which computer networks differ from each other. [6 Marks]
b) Describe briefly five main functions of most Network Operating Systems. [5 Marks]
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c) Discuss the concept of connection-oriented and connectionless services as applied in computer
networks. [6 Marks]
d) Describe briefly the three major components of a fiber optic cable. [3 Marks]
QUESTION THREE
a) 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]
b) Explain any six benefits of the OSI Model [6 Marks]
c) Most modern telecommunication companies are adopting digital communication/transmission for a
number of reasons. Briefly discuss any four (4) of them. [8 Marks]
d) Explain why Ethernet is considered scalable [2 Marks]
QUESTION FOUR
a) With the aid of diagrams, differentiate between singlemode and multimode fibre optic cables.
[6 Marks]
b) With the aid of a simple diagram, describe how parallel transmission is done. [5 Marks]
c) Define the following terminologies in relation to computer networks
(i) Stub network [1 Mark]
(ii) DHCP [1 Mark]
(iii) CPE [1 Mark]
(iv) DCE [1 Mark]
(v) DTE [1 Mark]
d) State any four reasons why TCP/IP is suited for implementations of intranets and extranets.
[4 Marks]
QUESTION FIVE
a) The physical layer is responsible for the transparent transmission of information across the
physical medium. The data unit at the physical layer is a bit. The attributes of the physical layer
interfaces can be grouped as electrical, functional, mechanical, and procedural. Describe briefly
each of these attributes. [8 Marks]
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b) A big part of administrator job is to maintain the network. List any five major network
maintenance activities. [5 Marks]
c) Your organization is migrating to a private IP addressing scheme defined via RFC 1918.
(i) Discuss the use of private IP addresses. [4 Marks]
(ii) Which three address ranges are used for internal private address blocks as
defined by RFC 1918? [3 Marks]

Computer Networks Question Paper

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