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Network

  1. 1. What is a network?
  2. 2. Two or more interconnected computers.
  3. 3. An office network
  4. 4. A school network
  5. 5. A home network
  6. 6. A network is useful for communication between computers, and for sharing resources
  7. 7. Communicating Sharing Chatting Sharing a printer Video conferencing Sharing storage Sending e-mail Sharing Files Playing games Internet connection
  8. 8. Types of networks
  9. 9. LAN Local Area Network
  10. 10. Local Area Network On a small area, e.g: within one building
  11. 11. Wide Area Network
  12. 12. How to make a network? Networking equipment
  13. 13. Network Interface Card
  14. 14. Network Cable
  15. 15. Now they can communicate
  16. 16. But what if I have three computers?
  17. 17. Switch
  18. 18. Switch workstation workstation workstation workstation
  19. 19. A B C D E Switch back If workstation B wants to communicate with workstation C
  20. 20. A WAN is made up of several connected LANs Wide Area Network
  21. 21. It can also be a group of several WANs, or some LANs and some WANs WAN
  22. 22. The Internet is the largest WAN in the world
  23. 23. How are LANs connected to make a WAN ?
  24. 24. LAN LAN LAN WAN
  25. 25. Computers and devices on a network
  26. 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. 27. Examples of servers Type Service Printer server Allows clients to print using one shared printer Storage server Allows clients to save/store their files on a shared drive Web server Hosts the web-pages, that are accessed by the clients Mail server Stores clients mail accounts and inboxes. Allows clients to send email.
  28. 28. Storage server Printer server Giovanni Nick Steve Brian James Carola
  29. 29. • A firewall protects your network against unwanted access.
  30. 30. • A firewall can be a hardware device and it can be software that is installed on a computer or a server.
  31. 31. How do you connect your network to the Internet?
  32. 32. 1. Router 2. ISP The Internet Service Provider, is a company, that has a very large connection to the Internet. Switch WAN WAN LAN
  33. 33. Other types of networks
  34. 34. LAN Wireless Local Area Network
  35. 35. Bluetooth network Personal Area Network

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