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LO1, versatile,they allow a user to carry out a range of activities -…

- - - - non-volatile storage saves the data even when not being powered,so it can be accessed when the computer is next on and can be stored long-term
    - - volatile storage is temporary,data is lost whenever the power is turned off
    - - volatile
      - stores parts of the operating system to be accessed by the CPU
      - stores all programs that are currently running
      - made up of a large number of storage locations,each can be identified by a unique address
    - - Non volatile storage that cannot be changed
      - stores the boot program for when the computer is switched on
      - The BIOS then loads up the operating system
    - - very quick to access because it is closer to the CPU
      - volatile-stores data that is frequently accessed
  - - - Is the most common form of secondary storage within desktop computers
      - read/write software
      - hard disk drives can be external and connected through a USB port
      - type-floppy disk which have been replaced with solid state devices
      - Type-magnetic tape
        
        high storage capacity
        
        archive large amounts of data
      - characteristics
        
        Relatively quick access speed but slower than solid state
        
        NOT durable and not very portable when powered on because moving it can damage the device
        
        large capacity and cheaper per gigabyte than solid state
    - - uses a laser to project beams of light onto a spinning disk allowing it to read from a CD,DVD,or Blu-Ray
      - slowest
      - characterisitcs
        
        low capacity
        
        not durable because discs are very fragile and can break or scratch easilty
        
        discs are thin and very portable
        
        optical discs have the slowest access speed
      - disc drives are mainly internal but external disc drives can be bought for devices like laptops
    - - there are no moving parts
      - SSDS are replacing magnetic HDDS
        
        quieter,faster and use less power
      - Type-A USB flash drive is used to transport files easily because of its small size
      - example
        
        Memory cards
      - characteristics
        
        high capacity but more expensive per gigabyte than magnetic
        
        usually durable but cheap USB sticks can snap or break
        
        The small size of USB sticks and memory cards mean they are very portable and can fit easily in a bag or pocket
        
        solid state storage has the fastest access speed because they contain no moving parts
    - - Data is stored on large servers owned by the hosting company
      - the hosting company is responsible for keeping the servers running and making your data accessible on the internet
      - cloud storage is typically free for a certain amount of storage
      - cloud storage is very convenient as it allows people to work on a file at the same time and it can be accessed from different devices
      - if connection fails or the servers attacked then the data could become inaccessible
      - charcteristics
        
        Huge capacity and you can upgrade your subscription if you need more storage
        
        cloud storage is diificult to rank in terms of portablity,durabilty and access speed because it depends on your internet connection.A fast connection would mean that cloud storage is very portable
  - - - processes graphical data
      - converts into a displayable output on a montior
  - - - Processes graphical data and converts it into a displayable output on a monitor
    - - Allows computers to connect to networks and enables them to transfer data to other computers
    - - Sound cards convert analogue sound waves into digitial data when inputting audio through a microphone
      - sound cards also covert digitial data into analogue sound waves to output audio through speakers or headphones
    - - Transfers data between servers across a network,Fibre channel allows for quick transfer speeds and is primarily used to connect data storage to servers in large data centres
    - - Required for the computer to manage and use any attached storage devices
  - - - connects storage devices such as USB sticks or external hard drives,Connects inout devices such as a keyboard as well as other devices for data transfer such as a camera or smartphone
    - - Firewire transfers data at a high speed from devices such as camcorders and external hard drives
    - - Enables data from an SD card to be transferred from a device like a camera to the computer
    - - Connects computers to network devices such as a modem or router,allowing access to the internet
    - - Allows data transfer to external HDD,SSD or optical drives
    - - Allows data from a micro-SD card to be transferred from devices such as phones, tablets and handheld games consoles to a computer
- - - - disadvantages
        
        privacy concerns
        
        disabled users might not be able to provide the biometric required
        
        affected by the environment
        
        time consuming
        
        expensive to install
      - Advantages
        
        quicker and easier
        
        verify that a uses is who they claim to be
        
        if a password is exposed the system cant be accessed
        
        security is improved
      - Biometric device uses a human characteristic as a security mechanism such as fingerprint
    - - common output devices:
        
        headphones
        
        projector
        
        speakers
        
        monitor
        
        printer
      - outputs created by a computer by a computer system
    - - common input devices
        
        Biometric scanner
        
        microphone
        
        controller
        
        keyboard
        
        mouse
      - entered into a computer system