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Igcse Ict Presentation   Master Slided
 

Igcse Ict Presentation Master Slided

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    Igcse Ict Presentation   Master Slided Igcse Ict Presentation Master Slided Presentation Transcript

    • Optical backing storage media suchas CDs and DVDs
      CDs tend to be used for large files (but smaller than 1Gb)which are too big for a floppy disc to hold such as music and general animation. DVDs are used to hold very large files(several Gb) such as movie films. Both CDs and DVDs are portable i.e. they can be transported from one computer to another. Both can be used to store computer data.
      Advantages
      • Can stored large files.
      • Portable.
      • Light, easy to carry
      Disadvantages
      • Memory less than 1GB.
      • Most DVD players and drives can't read DVD-RAM discs.
      • Very few players can play in reverse at normal speed.
      Maprang 10GM
    • Applications which require the prevention of deletion of data, accidental or otherwise. CDs used by software companies for distributing software programs and data; by Music companies for distributing music albums and by book publishers for distributing encyclopedias, reference books etc. DVDs used by film distributors.
      Advantages
      • Can stored data permanently.
      • They are not expensive.
      • A CD-ROM is a storage media that has a better longevity for storing data in a moderately small space, when added to the fact that they can be stacked in a small space the amount of storage per cubic foot goes up.
      Disadvantages
      • Can not delete or edit saved data.
      CD ROM/DVD ROM
      Maprang 10GM
    • Applications which require a single ‘burning’ of data, e.g. CDs– recording of music downloads from the Internet, recording of music from MP3 format, recording of data for archiving or backup purposes. DVDs – recording of film movies and television programs.
      Advantages
      • Light and thin
      • Not expensive
      • Fast responding
      Disadvantages
      • Single burning
      CD R/DVD R
      Maprang 10GM
    • Applications which require the updating of information and ability to record over old data. Not suitable for music recording but is very useful for keeping generations of files. DVDs have between five and ten times the capacity of CDs.
      Advantages
      • Less expensive than Blu-ray.
      • It generally holds about 650 mb of data or 74 minutes of audio.
      Disadvantages
      • Slower to write (respond)
      CD RW/DVD RW
      Maprang 10GM
    • Housed in a cartridge. Used in video recorders, camcorders and computer memory.
      Advantages
      • superior quality of the discs
      • Less problem about formatting and finalising.
      • Long life
      Disadvantages
      • Less compatibility than DVD-RW and DVD+RW
      • 12x media is not reportedly available in Europe
      • DVD-RAM media have always been more expensive than other types of DVD.
      DVD RAM
      Maprang 10GM
    • Used in video recorders and computer memory as well as games consoles – main rival to blu-ray.
      Advantages
      • Cheaper price comparing to Blu-ray
      • Fully compatible with all features
      • More user/consumer friendly.
      Disadvantages
      • HD DVD holds a maximum of 30 GB of data, while a dual-layer Blu-ray carries 50 GB.
      • Expensive than a normal CD.
      HD DVD
      Maprang 10GM
    • Used in video recorders and computer memory as well as games consoles. Largest storage capacity of optical media.
      Advantages
      • Light and thin.
      • Easy to carry.
      • Huge storage capacity.
      Disadvantages
      - More expensive than HD DVD
      Blu-ray
      Maprang 10GM
    • Smallest form of memory, used as removable storage. More robust than other forms of storage. More expensive than other forms but can be easily written to and updated.
      Advantages
      • The random access speed for reading is faster because it doesn't need a head to read or write data.
      • Reading performance will be more stable because the data search doesn't depend on where the data is located.
      Disadvantages
      • The writing speed of a Solid State is slower compared to the conventional hard disk.
      Solid state backing storage
      Maprang 10GM
    • Can store up to many Gb. Used to transport files and backup data from computer to computer.
      Advantages
      • Size is smaller than DVD or CD.
      • Easy to carry.
      • The design is more fashionable
      • Very easily allows you to transport documents from one computer to another.
      • It holds a lot more data than a floppy disk.
      • Not expensive.
      Disadvantages
      - Easily lost because it is small.
      Memory sticks/Pen drives
      Maprang 10GM
    • Used in digital cameras, palmtops, mobile phones, MP3 players.
      Advantages
      • Small, easy to carry around
      • Easy to transport data from one to another.
      • it holds lots more data than a floppy disk.
      Disadvantages
      • Most computer doesn’t have flash card devices to connect them to the computer so, we have to buy one.
      • Easily lost.
      Flash memory cards
      Maprang 10GM