Topic three

Topic three

1. Satellite communication

   • Used for communication across continents
   • Uses radio signals to send data
   • Data signals from on continent are beamed to the satellite in orbit and then sent back down to a satelite dish in another continent

2. Wireless

   • Data travels through air rather than cables
   • Can access the internet on portable devices such as amobile
   • Users can work where and when they want.
   • There is a danger of hacking

3. Communication Equipment-Modems

   • A device that allows a computers to be connected to the internet
   • Dial up, slow connection making use of telephone line
   • Cable/broadband, fast broadband conection

4. Router

   • Device that enables a network to be connected to the interent
   • Enables several computer to share the same internet connection
   • Often allows wireless internet connection

5. Other communcation systems

   • Bluetooth
     • Bluetooth is a method used to transfer data over short distances from fixed and mobiles devices
     • It is used to transfer data between portable devices without the need for wires
     • Applications for bluetooth include:
       • Wireless keyboard and mice avoid clutter on your desk and make the desk easier to clean
       • Wireless headsets allowing you to drive legally when you are using your phone
       • Sharing data such as voice, music and video wirelessly with others
       • Printing a picture from your camera phone
       • Listening to music using wireless earphones

6. Geographical information system (GIS)

   • ICT system that is used to capture, manage, analyse and display geographically referenced information
   • Satellite navigation are a type of GIS
   • Route-finder are also an example of GIS