Posted in A+, Belajar, Certification, CompTIA

CompTIA A+ Ver1

  • Key Processing Components
    • CPU
      • Most important hardware device
      • Receive input and sends output
      • Store data and instructions. Perform calculations
    • Resources
      • Method for CPU to communicate with the device
      • Software to instruct and control the device
      • Electricity to power the device
    • Ports
      • Physical connector that allow a cable from a peripheral device to be attached
    • Input Devices
      • Keyboard, mouse, scanner
    • Output Devices
      • Monitor, printer, plotter
    • Software Defined
      • Computer programs, or instructions to perform a specific task
    • 3 Types Software
      • Firmware (BIOS)
        Controls computer’s input function / output
      • OS
        Provide instruction to hardware to perform tasks
      • Application Software
        Perform a specific task
    • Works in Layers
      • Lowest Layer(BIOS and device drivers) interfaces with hardware
      • Hightest Layer(Application software) interfaces with user
  • The Boot Process

    • System Resources
    • Every device must have the following resources
    • The Boot Process
      • Bios test hardware (POST)
      • Bios searches for and loads OS
      • The OS configures the system
      • The user executes applications
    • IRQ(Interrupt Request Number)
      • A line on a bus that is assigned to a device and is used to signal the CPU for servicing
    • Input / Output Addresses
      • Numbers used by devices and the CPU to manage communication between them
      • Also called port addresses or ports
    • DMA Channels
      • A Shortcut method whereby an input / output device can send data directly to memory, by passing the CPU

  • The System Board
    • The System Clock
      • Clock Frequency(GHz)
      • Clock Speed
      • Early CPU : 5 Volts
    • Processors
      • Bus Speed
      • Processor Speed
      • Multiplier
      • Memory Cache
    • CPU Voltage Regulator
      • Dual Voltage CPU
      • Single Voltage CPU
    • AT and ATX
  • Memory
    • ROM
    • RAM
      • SRAM
        • Synchronous SRAM
          • Faster and more expensive than Asynchronous SRAM
          • Requires a clock signal to validate control signals
        • Asynchronous SRAM
          • Does not work in step with the CPU clock and is therefore, slower than Syn SRAM
    • Types Of Memory
      • SIMM(Single Inline Memory Module)
        • Width of data path = 32 bits
        • FPM(Fast Page Mode) memory and EDO(Extended Data Output) memory
      • DIMM(Dual Inline Memory Module)
        • Width of data path = 64 bits
        • Use burst EDO or Syn SDRAM
      • ECC, Parity memory and nonParity memory
  • Data Storage
    • HardDrive Hold Data
    • HardDrive Terminology
    • HardDrive Technology
    • Calculating Drive Capacity
    • Commands
    • Other Types Of HardDrive Interfaces
    • SCSI


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