TIL Ethernet wire colors
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TAGS: network certifications
Ethernet wires are more than just 'a cord'.
Ethernet Adapter Type: #
There's a Type A & Type B.
NOTE: Many devices now have Auto MDI-X, which will automatically fixes A->B if needed.
Pin Types:
via https://www.startech.com/en-us/faq/network-cables-a-vs-b-pinout
A easy way to remember:
- It's mixed, solid, mixed, solid... (so white/green, green)
- At mixed, it's always starts with white.
- It's easier to remember all the colors, then remember the mixed.
T568A:
Green Gremlins Or Blue Bats Or Brown Bears.
green
green
orange
blue
blue
orange
brown
brown
white/green
green
white/orange
blue
white/blue
orange
white/brown
brown
T568B:
Odor On Goats bring back grizzly Brown Bears.
white/orange
orange
white/green
blue
white/blue
green
white/brown
brown
orange
orange
green
blue
blue
green
brown
brown
Ethernet Cord Type: #
patch cable (or straight-through cable)
Default
How to determine which one to use?
A basic rule of thumb is: If it's the same device, you'll need a crossover cable.
Ethernet wire categories: #
They all use the RJ45 connectors, except Cat7.
Cat5e: 1Gigabit
Cat6: 10Gigabit
Cat6a: 10Gigabit
Cat7: 10Gigabit. Different type of connector, and not IEEE approved.
Cat8: 25-40Gigabits.
Key terms #
Open - There's no connection between two ends of a cable or wire. Like if a wire is cut in half.
Short - It's when current is flowing to a place where it's not supposed to. Like a damaged cable where two+ conductors are connected.
Crosstalk - When voltage is sent to adjacent line, like when pairs of wires become untwisted, or no more shielding/insulation remains.
Electrostatic Discharge - A sudden flow of electrically charged objects.
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Tagged: network