1. TYPES OF NETWORKS. Networks

2. A network is a set of computers that are linked together so they can share resources such as printers, data files and software.

3. 1. Resource Sharing - Sharing resources is another area in which a network exceeds stand-alone computers. Most schools cannot afford enough printers, fax machines etc. However, if these or similar peripherals are added to a network, they can be shared by many users.

4. 2. Speed - Networks provide a very rapid method for sharing and transferring files.

5. 1. Expensive to Install - Although a network will generally save money over time, the initial costs of installation can be prohibitive.

6. 2. Requires Administrative Time - Proper maintenance of a network requires considerable time and expertise.

7. There are three types of Networks: 1.LAN (Local Area Network) 2. MAN (Metropolitan Area Network) 3.WAN (Wide Area Network)

8. A local area network (LAN) is a network of computers located in a single building, a single site, an office suite or a group of buildings. It connects devices that are confined to a relatively small geographical area.

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10. 1.Flexibility – Many different hardware devices e.g. plotters, printers and computers can be attached to a LAN. 2.Hardware and software sharing- All resources are share among users.

11. 1.The LAN is confined to a small geographical area. 2.Cables can be destroyed easily.

12. A Metropolitan Area Network is larger than LAN. It can span several buildings and possibly into other cities.

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14. 1.Joins together two or more LANs situated around a site. 2.Can cover a larger geographical distance than LAN.

15. 1.They typically use wireless connections that are prone to interference. 2.Costly to install and maintain.

16. A wide area network (WAN) can consist of several LANs and can connect computers across cities, states and even countries. WANs are used by large companies that have offices abroad.

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18. 1.Covers a wide area of networks. 2.Beneficial to large companies and Government agencies.

19. 1.Expensive to Install - Although a network will generally save money over time, the initial costs of installation can be prohibitive. 2.Requires Administrative Time - Proper maintenance of a network requires considerable time and expertise.