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1.1 computer hardware, This is a type of device that puts data from a user…

- - - - A hub will copy the packet received from a device and send it to all the others connected and which ever computers need it can collect it, this increase network traffic and can be a security risk.
    - - This requires for the message to be sent it knows what computer to send it to and this makes it so that network traffic goes down because only the needed messages are going to the computer that needs the message.
- - - - This is where the most important components are stored an this will save time when accessing and cooling them.
    - - This manages the functions of the computer and then it does this by processing the data and instructions.
    - - It converts Alternating Current (AC) to Direct Current (DC) which is what the components need.
  - - - This is a volatile form of memory and is used so that data can be stored in the short term and is wiped when it loses power.
    - - This the BIOs of the computer and is what makes up the main systems when the computer starts up and this is not mutable which means it is usually not alterable and if done it is hard and can cause permeant damage easily.
    - - This is by far the smallest here because it is used in the CPU (Central Processing Unit) to store the information that it is working on.
  - - - This is also known as a HDD or Hard Disc Drive and this is used to store information in the long term they have large amounts of storage and work by a spinning disc having switch's moved nano metres by a magnet.
    - - These are CDs and these are long term way to store information that you want to keep as in a physical format and they are extremely portable but fragile and require specialist equipment to make.
    - - This is in the form of SSDs that are Solid State Drives and they are an upgrade to a HHD because it works like RAM which makes it faster but it is more expensive.
    - - Cloud storage unlike the rest doesn't have physical contact with your computer it is a way to store data where it is stored in lots of different areas on the internet.
  - - - This a card orientated towards making good graphics.
- - - - This is a utility software and it records who was logged in and what the error was.
    - - A usual desktop does this PC does this when it powers on it checks all the components as it turns them on and checks for errors in them.
    - - This is a connectivity test between computers and that means that one sends a ping and the other "echoes" it and vice versa.
- - - - Keyboard
        
        A keyboard inputs data into a system and this is a very common one and not to be confused with touchscreen on a handheld device because you will be penalised on a unit 1 exam.
      - mouse
        
        This is how users communicate with a GUI (Graphical User Interface) and this is not important in CLI (Command Line Interface)
      - Scanner
        
        This are usually used in shops because they are used to scan something so that it can read it and use the information from it.
      - Controller
        
        A remote is used when using a tv it has a select set of input options.
      - Web cam
        
        A web cam is important in calls because it inputs a video of you or what ever you want to show and is mainly used on video calls.
      - Chip reader
        
        A chip reader is because it can be used to scan RFID chips which his good because it can save time on identifying items and finding them.
  - - - Screen
        
        This is the main output device it is used for the computer to display the information from the computer is able to be shown visually
      - Printer
        
        A printer allows for the system to put the visual data to be put into a physical format.
    - - An output device is when a systems puts information out of the system to another system
- - - - This is cheaper option than fibre optic and is done by sending pulses through a copper wire and reading them as 1s and 0s it is venerable to interference and it is fully duplex
    - - Fibre optic is a lot faster than copper and is harder to disturb because it is light it is able to TIR (Total Internal Reflection) physics stuff it is and is only half duplex but doesn't really matter because of speed and multiple cables.
  - - - Bluetooth is a short range connection and is limited to about 10m this is used to set up a quick network to share information.
    - - This is old technology it is sending a signal using technically heat and requires line of site.
    - - Microwave require line of sight and can travel long distances and are affected by bad whether and obstacles.
    - - This is rarely used in is able to send data but requires and there can be NO BARRIERS or it will be blocked.
    - - This is used to connect multiple points together while with a lot of barriers because it sends the data out to space and back bypassing obstacles.
    - - GMS(Global Messaging Service) This is used in phones and is less vulnerable to obstacles but is weakened by obstructions.