hardware

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  • Created by: Elli
  • Created on: 13-02-13 18:54
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  • Hardware and Communication
    • Processor
      • at the heart of every computer is the CPU.
        • it refers to that part of the processor which processes the data and instruction
          • ALU
            • performs the calculations on the data
          • Control Unit
            • controls all operations inside the computer
          • Memory
            • Register is a place where the single item of data can be store
            • RAM
              • used to temporarily store programs and data
              • memory consists of sotre locations which are identified by addresses.
              • data is moved by an address bus
      • all computers have at least one input device, and at least one output device
    • Bits,Bytes and Words
      • 8 bits = 1 byte
      • bit is a binary digit ( 1 or 0 )
      • word is the number of bits that the CPU can handle at anytime ( 16,32,64,128)
    • Networks
      • disadvantages
        • 1/ viruses can be spread to all on network
        • 2/ hackers may access computers on the network
        • 3/ network failure means nobody can use the computer
        • networks may be slower using a standalone computer
        • 5/ cableing may be expensive to install
      • advantages
        • 1/ hardware can be shared
        • 2/software can be shared
        • 3/ data can be shared
        • 4/computer may communicare between each other

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