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

DIGITAL LOGIC

Compares 1 and o..billions and billions

BInary System :
BITS - Binary Digit
• 8 bits are standard
• 1 byte = 8 bits . Stores 28 = 256 possible values

Character Encoding:
Assigns binary values to characters, so that we humans can read them.
1. ASCII - oldesst character encoding uses 127/256
2. UTF-8 - Variable number of bytes( more than one byte)
3. RGB - color simple 8 character combination

Binary:
ON or OFF . Punch Cards
Uses Transistors.
Logic Gates.
Helps in sending electrical signals.