INFORMATION COMMUNICATION TECHNOLOGY (ICT)
Previous lesson :
The pupils have previous knowledge of
DESCRIPTION OF LOCAL AREA NETWORK AND LARGE AREA NETWORK
Behavioural objectives :
At the end of the lesson, the pupils should be able to
- define local network network
- define large area network
- list the benefits of area networks
- mention places where local and large area network are best used or utilized
Instructional Materials :
- Wall charts
- Related Online Video
- Flash Cards
- A Desktop computer of Laptop
Methods of Teaching :
- Class Discussion
- Group Discussion
- Asking Questions
- Role Modelling
- Role Delegation
Reference Materials :
- Scheme of Work
- Online Information
- 9 Year Basic Education Curriculum
Types of networks
The two types of computer networks are:
1 Local Area Networks (LAN); and
2 Wide Area Networks (WAN)
Local Area Networks
LAN consists of a collection of microcomputers that can share peripherals and information. They can also communicate with each other on the network.
Microcomputers in a LAN are usually in the same building or a school. Each microcomputer in a LAN can work both as an independent personal computer running its own software and as a workstation. A LAN has a network server. This runs the network operating system which allows resources to be shared with other computers on the network. Each computer on a LAN is known as a client. The devices shared by a LAN are printers, hard disk drives, disk drives, CD-ROM drives, modems and fax machines.
Advantages of a LAN
1 Software and data files can be shared by many users.
2 It is usually cheaper to buy one copy of a software application and pay the license fee for several machines, than to buy individual packages for each computer.
3 Users can work together on a single document from different parts of the network (though not at the same time).
4 Users can communicate with other users on the network using e-mail.
Wide Area Networks (WANs)
A WAN connects networks across a large geographical area such as a city, state or country. Information can be transmitted using special high-speed telephone lines, microwave links, satellite links or a combination of all these. WANs are used in universities, research centers, companies and banks, so that information can be shared across a country or across many countries.
Metropolitan Area Network (MAN)
This type of network is mostly used by Radio and Television stations. In this case, computers are interconnected within a wider geographical location such as within a town, city or state for the purpose of data communication.
The topic is presented step by step
The class teacher revises the previous topics
He introduces the new topic
The class teacher allows the pupils to give their own examples and he corrects them when the needs arise
The class teacher wraps up or conclude the lesson by giving out short note to summarize the topic that he or she has just taught.
The class teacher also goes round to make sure that the notes are well copied or well written by the pupils.
He or she does the necessary corrections when and where the needs arise.
- Explain the meaning of local area network
- Mention two types of computer networks
- Explain the meaning of Large Area Network
- Write out three advantages of Large Area Network
- Mention five computer users
Prepare for the next lesson by reading about computer topology
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