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What is a network?

What is a network?. Two or more interconnected computers. An office network. A school network. A home network. A network is useful for communication between computers, and for sharing resources. Types of networks. LAN. LAN. L ocal A rea N etwork.

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What is a network?

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  1. What is a network?

  2. Two or more interconnected computers.

  3. An office network

  4. A school network

  5. A home network

  6. A network is useful for communication between computers, and for sharing resources

  7. Types of networks

  8. LAN LAN Local Area Network

  9. On a small area, e.g: within one building Local Area Network

  10. Wide Area Network WAN

  11. How to make a network?Networking equipment

  12. Network Interface Card

  13. Network Cable

  14. Now they can communicate

  15. But what if I have three computers?

  16. Switch

  17. workstation workstation Switch workstation workstation

  18. C back D B A E Switch If workstation B wants to communicate with workstation C

  19. WAN

  20. Wide Area Network A WAN is made up of several connected LANs

  21. It can also be a group of several WANs, or some LANs and some WANs WAN

  22. The Internet is the largest WAN in the world

  23. How are LANs connectedto make a WAN?

  24. ROUTER LAN LAN LAN Router Router WAN WAN WAN

  25. Computers and deviceson a network

  26. Clients & Servers • It is called a Client, because it receives services from a Server • A Server is normally a powerful computer, that provides services to other computers and devices on a network

  27. Examples of servers

  28. Giovanni Nick Steve Storage server Brian James Printer server Carola

  29. Firewall • A firewall protects your network against unwanted access.

  30. A firewall can be a hardware device and it can be software that is installed on a computer or a server.

  31. How do you connect your network to the Internet?

  32. 1. Router 2. ISP The Internet Service Provider, is a company, that has a very large connection to the Internet. WAN Router Internet ISP Switch WAN LAN

  33. Other types of networks

  34. WLAN LAN Wireless Local Area Network

  35. PAN Bluetooth networkPersonal Area Network

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