220-801 Question #1: Real Exam Question with Answer & Explanation

The correct answer is A: Orange/white, orange, green/white, blue, blue/white, green, brown/white, brown. The T568B wiring standard defines this exact pin order (pins 1–8): Orange/White, Orange, Green/White, Blue, Blue/White, Green, Brown/White, Brown. T568B is the most commonly used wiring standard in North America for Ethernet patch cables and structured cabling. The key difference

Question

Which of the following is the correct pin out for T568B?

Options

AOrange/white, orange, green/white, blue, blue/white, green, brown/white, brown
BBlue, blue/white, orange/white, orange, brown/white, brown, green/white, green
CGreen/white, green, orange/white, blue, blue/white, orange, brown/white, brown
DOrange/white, orange, brown/white, brown, green/white, green, blue, blue/white

Explanation

The T568B wiring standard defines this exact pin order (pins 1–8): Orange/White, Orange, Green/White, Blue, Blue/White, Green, Brown/White, Brown. T568B is the most commonly used wiring standard in North America for Ethernet patch cables and structured cabling. The key difference from T568A is that the orange and green pairs are swapped. Memorizing this order is essential for correctly terminating RJ-45 connectors and punch-down blocks.

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