Understanding Computer Networks: Types, Components, and Connections

1. ICT II Unit 5 Networking

2. What is a network? • A network is a group of computers connected together in such a way as to allow resources to be shared.

3. What does a network consist of? • A network consists of two or more computers that are linked in order to share resources (such as printers and CD-ROMs), exchange files, or allow electronic communication.

4. How are networks connected? • Through cables • Through telephone lines • Through radio waves • Through satellites • Through infrared light beam

5. Types of Network • LAN • MAN • WAN

6. LAN • LAN – Local Area Network • Confined relatively to a small area • Generally limited to a building or a geographical area • Expanding no more than a mile apart to other computers

7. Components of LAN • A file server – stores all of the software that controls the network, as well as the software that can be shared buy the computers attached to the network • A workstation – computer connected to the file server; less powerful than the file server • Cables – used to connect the network interface cards in each computer

8. LAN

9. MAN • Metropolitan Area Network • Covers larger geographical areas, such as cities • Often used by libraries and government agencies to connect to citizens and private business industries

10. MAN

11. WAN • Wide Area Network • Connects larger geographical areas, such as London, the UK, or the world

12. WAN

13. Components of a Network • Cables • Network adapters cards • Hubs -simply connects all of the devices on its ports together • Switches - A switch is like a tiny telephone company that lets pairs of devices make direct connections.

14. Components of a Network • Router - a device that transfers data from one network to another in an intelligent way • Server - computer or device on a network that manages network resource