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computer science - Coggle Diagram

- - - - data that is sent one bit at a time through a single wire
    - - data that is sent several bits at a time through multiple wires
    - - data that is in binary numbers (that are grouped together) that are sent in order
    - - data that is in binary numbers (that are grouped together) that are sent using a internal clock or at the same time
  - - - it helps access websites or movies such as in netflix that cant be seen from the country your in or censored in ur country
    - - gives the location of the device on the internet.Think of IP address as your house address.it has some unique way of identifying it such as your postal code
    - - identifies the device connected to the internet and can be uniquely associated with the individual in the house
  - - - even parity-has even 1's and 0's
      - odd parity-has un even numbers of ones and 0's
- - - - RAM
        
        random access memory.its a volatile memory chip that stores files currently in used.Could be read and written and content could be edited
        
        types
        
        DRAM
        
        dynamic ram
        
        made up of millions of transistors and capacitors.They are cheaper than sram and saves energy
        
        2 more items...
        
        SRAM
        
        difference between dram and sram is that sram page doesn't need to be constantly refreshed
      - ROM
        
        Read only Memory.A non volatile and permanent memory that its content can only be read but not written.This are for instructions when the computer is firstly switched on.
  - - - SSD- Solid state drive-.Has no moving parts and stores files through the movements of electrons
      - HDD-Hard Disc Drive.Contains moving parts a such as tracks.I stores files via magnetic properties
- - - - examples
        
        qr and barcodes
        
        Qr codes are made up of a matrix filled with dark squares and a white background
        
        barcode-a series of dark and light parallel line varying thickness
        
        sensors
        
        require physical data and converts them into digital data
        
        examples
        
        temperature-monitors central heating system
        
        pressure-detects intruders in a burglar alarm system
        
        acoustic-monitors sound such as footsteps in a burglar alarm system
        
        motion-monitors the motion of screen wipers in a car
        
        ph-measures the acidity in the soil
        
        magnetic field-Use for an anti lock system in motor vehicles
        
        gas-monitors pollution in the air and the rivers
        
        moisture -monitors moisture in the soil
  - - - examples
        
        inkjet printers
        
        a printhead that consisting with nozzles that sprays droplets of ink to create characters.The ink cartridge consists of (magenta,yellow and blue) and black.A stepper motion moves the printhead from side to side across the page
        
        laser printers
        
        major difference between the laser printer and the inkjet printer is the way they print. it uses powdered ink instead of liquid.The laser printer uses the static electricity to produce text images,The printer could print the whole page in one go instead of printing line by line.
- - - - 1,2,,3,4,5,6,7,8,9,10,11,12.....
    - - 1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,10,11,12..
        
        WAYS TO FIND IT
        
        EX:101010. first use the base 2 system and use only the base 2 numbers that are 1s in the binary then add them all up
        
        divide the 8 digits into two groups in that way they have 2 groups with each having 4 digits and use the base 2 system agin like the first method but with four digits such as 1,2,4,8
    - - 1,2,4,8,16,32,64,128,256....