HideShow resource information
View mindmap
    • Security Issues
      • Data Security
        • Loss or damage during a system crash
        • Corrupted/ faulty disks/drives
        • Hacked into by unauthorised users and the information can then be altered, stolen or deleted etc
        • Destroyed by natural disasters such as flooding or fire
        • Loss or corrupted by computer viruses
    • Networks
      • Local Area Network (LAN)
        • A LAN covers a small area such as one site or building, eg. a school/college
      • Wide Area Network (WAN)
        • A WAN covers a large geographical area. Most WANs are made from several LANs connected together.
      • ~The internet is a WAN      ~a network of a bank cash dispensers is a WAN          ~A school network is usually a LAN ~LANs are usually connected to WANs, for example a school network could be connected to the internet
    • Hardware
      • Concept keyboard~ the buttons can be labelled with text or an image. Fast food restaurants often use these as little training is needed to operate them and they're efficient~ a single button can order a meal
      • Trackball~ An alternative to a mouse. User rotates the ball which moves the pointer on screen. They are easy to use for people with limited movement in their arms/hands. These are used in computer aided design for increased prevision over a mouse
      • Scanner~ This is used to digitize images. This is similar to a photocopier but they make digital copies instead of physical. They can be used with optical character recognition (OCR) software to scan text that is then editable


No comments have yet been made

Similar ICT resources:

See all ICT resources »See all different topics resources »