Index

TECHNICAL SUPPORT FUNDAMENTALS

  1. INTRO -> IT
    1. HISTORY OF COMPUTING
    2. DIGITAL LOGIC
    3. COMPUTER ARCHITECTURE LAYER
  2. HARDWARE
    1. The Modern Computer
    2. MOBILE DEVICES
    3. PERIPHERALS
    4. STARTING IT UP
  3. OPERATING SYSTEM
    1. INTO KERNEL
    2. USER SPACE
    3. INSTALLING OS
  4. NETWORKING
    1. INTERNET
  5. SOFTWARE
  6. TROUBLESHOOTING

The Modern Computer

Computer Hardware

:



Ports : Connection points where we can connect external devices to extend the functionality of the computer.
CPU : Central Processing Unit . Does all calculation and data processing
RAM : Random Access Memory. Temporary Memory
Hard Drive : Holds all data
Motherboard : The body or ciculatory system of the computer that connects all pieces together.

Programs : Instructions followed by computer.
External Data Bus(EDB) : Row of wires that interconnect parts in the computer. 8,16,64 bit.
Registers : Lets us store data. High-speed storage locations.
Memory Controller chip : Bridge between CPU and RAM
Address Bus : Connects CPU to MCC. data is later sent thru EDB
Cache : Smaller, frequent storages. Three levels : L1:smallest and fastest , L2 ,L3
Clock wire : A clock signal oscillates between a high and a low state and is used like a metronome to coordinate actions of digital circuits.
Clock speed : 3.40 giga hertz = 3.4 billion cycles per seconds
Overclocking : To speed up the computer beyond the manufacturer's specifications in order to run faster.

CPU

:


Instruction sets are hard coded.
Land Grid Array : pins stick out
Pin Grid Array : pins are on the cpu itself
Heat Sink : Reduces the heating
32bit or 64bit architecture : how much data efficiently handle

RAM :


Temporary
Volatile
DIMM : Dual inline Memory Module - have different sizes of pin on them.
DRAM : Dynamic RAM- stores each bit microscopic capacitor
SDRAM : Synchronous DRAM
DDR SDRAM : double data rate SDRAM . faster. less power consumption.

MOTHERBOARD :


Chipset : 1. Northbridge : Interconnects RAM and video cards
2. Southbridge : Maintains I/O controllers
Expansion Slots : Gives us ability to increase functionality of our computer. PCI EXPRESS -Peripheral Component Interconnect Express
ATX : Advanced Technology eXtended -> most common form factor for motherboard
ITX : Information Technology eXtended -> smaller sixed

STORAGE :


Data sizes : 1000 byte = 1KB
Hard drives :1. Hard Disk Drives (HDD) : Spinning platter and mechanical arm to read and write information. platter speed - rpm . More Affordable
2. Solid State Drives (SSD): Data stored on microchips. Faster than HDD. Expensive
ATA : SATA-> drives
NVMe = drive for ssd (faster)

POWER

SUPPLY

:


Converts AC to low voltage DC
Wattage : Amount of current and voltage needed

https://docs.microsoft.com/windows-hardware/design/device-experiences/powercfg-command-line-options#option_batteryreport
https://support.apple.com/HT201585