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Understanding computer hardware - Coggle Diagram
Understanding computer hardware
1.1 - computer hardware
input devices
mice
microphone
keyboard
output devices
headphones
speakers
monitors
communication devices
switches
use a lan to send packets to the right device
hub
router
1.2 - computer components
storage
primary
RAM
ROM
Cache
secondary
HDD
SSD
CD, dvd, blu ray
magnetic tape
ports
visual
HDMI
DVI
Display port
VGA
Others
PS2
USB
3mm jack
SATA
1.3 - types of computer system
desktop
laptop
tablet
smartphone
pros
portable
can connect to the internet without a WAP
cons
battery operated
very limited hardware
embedded system
1.4 - connectivity methods
1.5 - communications hardware
1.6 - troubleshooting
1.7 - units of measure
1.8 - number systems
decimal
the number system most humans use, containing of all numbers from 1 to 10, such as 99
binary
consisting of base 2, and only 1's and 0's, each number along increases the value of the 1 or 0 by 2x, such as 10 being 2 but 01 being 1
Hex
includes numbers and letters, such as C4 being 196, each value is a multiplied by 16, the numbers in the 1st slot is by one, 2nd slot is by 16 ect
1.9 - number conversions
dec into bin
work out conversions according to the image
since binary works in base 2, any further number will require more 0's and 1's
e.g 10000111 = 135
bin into hex
take each nibble and convert according to the image
e.g 10111001 = 1011 and 1001. = B9
dec into hex
the most reliable method is to convert to binary and then to hexadecimal, so refer to the other two methods
