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

INTO KERNEL

Files

Handling

:


File System : NTFS - Windows ;encyption, HFS+ & APFS - MACOS , ext4 - linux

File data : we write data in form of data blocks : block storage is faster to access

Metadata : info about the file : creation, date modification, file extension

Process Management :


Program that is executed . Program is an runnable applications.
resources for multiple processes
Time slice : short interval of time allocated to a procesxs for cpu executions...milliseconds
Manages termination of processes too

Memory Management :


Virtual Memory : gives us more memory more than what we have physically
The combination of hard drive space and RAM that acts like memory that our processes can use.
pages sent to virtual memory then to physical memory for stuff not used..like menu never used

I/O Management :


Devices that perform i and o
Kernel needs to load up drivers to communicate to hardware.
Intercommunication btwn devices