Networking

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Networking

  1. 1. Networking ICT GCSE
  2. 2. What is a network? <ul><li>Two or more computers linked together, allowing them to share resources </li></ul><ul><li>Such as: </li></ul><ul><ul><li>Files </li></ul></ul><ul><ul><li>Printers </li></ul></ul><ul><ul><li>Internet Connections </li></ul></ul>
  3. 3. Advantages <ul><li>You can: </li></ul><ul><ul><li>Share resources </li></ul></ul><ul><ul><li>Share hardware </li></ul></ul><ul><ul><li>Share software </li></ul></ul><ul><ul><li>Share data </li></ul></ul><ul><ul><li>Transfer data easily </li></ul></ul><ul><ul><li>Centrally manage resources </li></ul></ul><ul><ul><li>Centrally manage security </li></ul></ul>
  4. 4. Disadvantages <ul><ul><li>Increased security risk (hacking) </li></ul></ul><ul><ul><li>Level of expertise required for management </li></ul></ul><ul><ul><li>Level of expertise required for setup </li></ul></ul><ul><ul><li>One server going down can affect the whole network </li></ul></ul><ul><ul><li>Viruses can spread easily between computers </li></ul></ul>
  5. 5. Stand Alone Computers
  6. 6. Topologies <ul><li>Computers can be connected together using different arrangements, known as topologies: </li></ul><ul><ul><li>Ring </li></ul></ul><ul><ul><li>Star </li></ul></ul><ul><ul><li>Bus </li></ul></ul>
  7. 7. Ring
  8. 8. Star
  9. 9. Bus
  10. 10. WAN and LAN <ul><li>WAN (Wide Area Network) </li></ul><ul><ul><li>Links computers in different countries </li></ul></ul><ul><ul><li>The Internet is an example </li></ul></ul><ul><ul><li>Most vulnerable to hackers </li></ul></ul><ul><ul><li>May use satellites </li></ul></ul><ul><li>LAN (Local Area Network) </li></ul><ul><ul><li>Links computers within the same building/site </li></ul></ul><ul><ul><li>Easy to restrict access </li></ul></ul><ul><ul><li>A LAN may be used to share access to a WAN for example the Internet </li></ul></ul>

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