Certification Training: A+ Notes Part 1
The 6-step Troubleshooting Process:
1) Identify the problem
2) Establish theory of probably cause
3) Test the theory to determine cause
4) Establish and implement a plan
5) Verify the fix
6) Document everything you do
North Bridge: This is located close to the processor. The North Bridge handles communication between RAM, AGP and PCIE slots.
South Bridge: Located further away from the processor than the North Bridge. The South Bridge handles slower communications such as: PCI, IDE and USB.
Class A Fire: Orindary combustibles
Class B Fire: Flammable liquids and gasses
Class C Fire: Electrical equipment
Most are between 120 and 240 volts.
Most are between 200 and 500 watts.
The current form factor standard of a power supply is ATX.
Type Size Used for
I 3.3in Storage
II 5in NICs, cellular cards
III 10.5mm HDD
USB / Fireware Transfer rates
USB 1.1 12 Mbps
USB 2.0 480 Mbps
IEEE 1394 400 Mbps
IEEE 1394b 800 Mbps
SODIMM 144 OR 204
Serial (RS232) 50 feet
USB 9 feet
Parallel 10 or 25 feet
Ethernet 100-300 meters
ThinNet 185 meters
ThickNet 500 meters
Fiber Optic single mode 30 miles
Fiber Optic multi mode 2,000 kilometers