Neco 2021 Computer Studies Question 7

Practice essay / theory question 7 from the 2021 Neco Computer Studies examination. This question covers Network Topologies, Cabling and Installation, IP Addressing and Subnetting .

Neco 2021 Computer Studies Essay / Theory
Topics: Network Topologies Cabling and Installation IP Addressing and Subnetting
Question 7 NECO • 2021 • COMPUTER_STUDIES • essay

A secondary school intends to install a local area network (LAN) to interconnect its Computer Laboratory, Library and Administrative Office. The requirements are: - Computer Laboratory: 25 desktop PCs and 2 network printers. - Library: 10 desktop PCs and 1 network printer. - Administrative Office: 5 desktop PCs and 1 network printer. The school plans to use a single central networking device (switch/router) as the hub for all connections. The straight‑line distances from the central hub to each department are: - Laboratory: 30 metres - Library: 20 metres - Administrative Office: 15 metres Using this information, answer the following questions.

Question Parts

( a )
Recommend the most suitable network topology for the school and justify your choice in terms of reliability, cost and ease of future expansion.
( b )
Calculate (i) the total number of individual cable runs required if each device is connected directly to the central hub, and (ii) the total length of cable needed (in metres).
( c )
The school will use the private IPv4 network 192.168.10.0/24 for the LAN. (i) Determine a subnet mask that will provide an equal number of host addresses for each of the three departments (Laboratory, Library, Administrative Office) while allowing for future growth. (ii) State the first usable IP address of the Laboratory subnet.

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About This Question

This is Neco 2021 Computer Studies Question 7. It is one of the essay questions from the 2021 Neco Computer Studies examination.

The question covers Network Topologies, Cabling and Installation, IP Addressing and Subnetting .

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