eoy computer(unfinished)

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  • End of Year Test
    • System Architecture
      • Von Neumann Architecture
        • Memory, holding both data and program
          • Control Unit
          • Arithmetic Logic Unit
            • Input
            • Output
            • Control Unit
    • Wired and Wireless Nrtworks
      • LAN is a local area network
        • Advantages
          • Quick and easy to set up.
          • Cheap to set up and maintain
          • Relatively fast
        • Disadvantage
          • Small area only
          • Relatively few computers/ users
      • WAN is a wide area network
        • Advantage
          • Can be any size, even global
          • Allows many more computers/ much more intricate and detailed
        • Disadvantage
          • More expensive to set up
          • Needs ongoing maintenance
      • Types of Network
        • Bus
          • Advantage--Simple
          • Disvantage-- Slow
        • Star
          • Advantage-- Fast
          • Disvantage-- Expensive
        • Ring
          • Advantage-- Cheap
          • Disvantage-- Stops if it breaks
      • Components in a Network
        • Computers
        • Server
        • Router
        • Switch
        • Printer
    • Network Topologies, Protocols and Layrers
    • Memory and Storage
      • ROM is used to store the start up process.
      • RAM is volatile, ROM is not.
      • RAM stores programs that are in use. eg, if you are using word, it will be stored there
      • Virtual Flash memory is used when the RAM is full and needs more space to run. It usually takes control of secondary storage
      • Flash memory is storage. USB sticks are a form of flash memory
      • Secondary storage is additional storage, such as a hard drive or an SSD.
      • Types of Storage
        • Solid state storage is SSD, it is quick but expensive.
        • Magnetic is like a hard drive (HDD) cheap, slow but lots of storage
        • Optical storage is accessible by everyone because they are discs, cheap. They are vulnerable to scratches
  • Memory and Storage
    • ROM is used to store the start up process.
    • RAM is volatile, ROM is not.
    • RAM stores programs that are in use. eg, if you are using word, it will be stored there
    • Virtual Flash memory is used when the RAM is full and needs more space to run. It usually takes control of secondary storage
    • Flash memory is storage. USB sticks are a form of flash memory
    • Secondary storage is additional storage, such as a hard drive or an SSD.
    • Types of Storage
      • Solid state storage is SSD, it is quick but expensive.
      • Magnetic is like a hard drive (HDD) cheap, slow but lots of storage
      • Optical storage is accessible by everyone because they are discs, cheap. They are vulnerable to scratches

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