Tuesday, 29 May 2012

Wireless Technology


Wireless technology is a technology without using wires or cables.  There are three examples of wireless technology which are BLUETOOTH, INFRARED and BROADBAND. 


  • A worldwide standard wireless through Personal Area Networks (PANs).
  • Can be used anywhere within a range of 10 metres.
  • A radio-based technology and does not need the line of sight.
  • Two types of service:
    • Point-to-point - One device to one device connection only.
    • Point-to-multiple - One device to eight more devices connection. Also called Piconets.
      • With multiple 'piconets' in one room, it is called 'scatternet'.


  • Same function with bluetooth tech which is to share files.
  • Shorter range than bluetooth - 5 metres.
  • Only for one-to-one connection - direct connection between two devices.
  • Uses Light Emitting Diodes (LEDs) to transfer data.
  • Cannot go through wall or any physical obstacles - need direct line-of-sight.


  • A high-speed internet connection through Wireless Local Area Networks (WLANs).
  • Two types of broadband:
    • Fixed broadband.

      • In permanent locations only. (e.g. House and office).
      • Includes LMDS (Local Multipoint Distribution System) and MMDS (Multichannel Multipoint Distribution Service).
    • Mobile broadband.
  • In temporary locations - anywhere.
  • In variety devices such as portable modem or mobile phones.
  • Same technology as the fixed broadband, but it can be brought anywhere. 

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