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Stefan Thorvaldsson – stefan@ywies PowerPoint Presentation
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Stefan Thorvaldsson – stefan@ywies

Stefan Thorvaldsson – stefan@ywies

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Stefan Thorvaldsson – stefan@ywies

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  1. Computer networks ICT InteraCT for KS3 Stefan Thorvaldsson – stefan@ywies.com

  2. Computer networks ICT InteraCT for KS3 What is a network? A network is two or more computer linked together so the are able to share resources. It could be a printer, scanner, folder, software or even a connection to the Internet.You can also share data using a network. For example, a database could be accessed from any of the computers connected to the network. Stefan Thorvaldsson – stefan@ywies.com

  3. Computer networks ICT InteraCT for KS3 Key concepts The key components Advantage and disadvantage The Use of Wi-Fi and Bluetooth Communication methods Differences between LAN and WAN Stefan Thorvaldsson – stefan@ywies.com

  4. Computer networks Networks ICT InteraCT for KS3 WANWide Area Network Covers wide geographical area In lot of buildings, countries or/and cities Uses more expensive links owned by telecommunication companies More expensive LANLocal Area Network Small areaUsually located in the same building Uses cable, wire-less usually owned by organization Less expensive to build Stefan Thorvaldsson – stefan@ywies.com

  5. Computer networks Networks ICT InteraCT for KS3 Advantage You can share printers, scanners, folders, Internet Connection and more Central Back Up SpeedAccess to central data Disadvantage Might need a network manager Security problems Viruses Breakdown problems Initial costs of equipment Stefan Thorvaldsson – stefan@ywies.com

  6. Computer networks Networks ICT InteraCT for KS3 Star network Bus network Tree network How computers link to each other in a network Stefan Thorvaldsson – stefan@ywies.com

  7. Computer networks Networks ICT InteraCT for KS3 Wi-fi Enables computers and other devices to communicate wirelessly with each other. Most known as get connected to the Internet. Bluetooth Is a wireless technology to exchange data over a short distance. Can be used up to 100m depending on the strenght of the signal. Keywords WAN LAN Network Bandwidth WLAN Stefan Thorvaldsson – stefan@ywies.com

  8. Computer networks Networks ICT InteraCT for KS3 Internet A huge group of networks working together. Each network consists a lot of smaller networks. Connected to the Internet you’re a part of the largest network in the world. Keywords Internet ISP Web Stefan Thorvaldsson – stefan@ywies.com

  9. Computer networks Networks ICT InteraCT for KS3 Network relatedtopics Intranets Bridges Routers Switches Hubs Proxy servers Internet related topics Browsers URLwww HTML Stefan Thorvaldsson – stefan@ywies.com

  10. Computer networks ICT InteraCT for KS3 Activity Search on the “Web” for information about the topics Think of advantages and disadvantages in every topic Do Activity 4.2 --------- Stefan Thorvaldsson – stefan@ywies.com