220-801 · Question #32
Which of the following pin pairs remain with the same wire color for either T568A or T568B?
The correct answer is D. Pair 4 & 5. T568A and T568B differ only in the placement of the orange and green wire pairs. In both standards, pins 4 and 5 carry the solid blue wire and the white/blue wire (the blue pair), and pins 7 and 8 carry the brown wires - these positions are identical in both T568A and T568B…
Question
Options
- APair 1 & 8
- BPair 2 & 7
- CPair 3 & 6
- DPair 4 & 5
How the community answered
(21 responses)- A5% (1)
- C10% (2)
- D86% (18)
Explanation
T568A and T568B differ only in the placement of the orange and green wire pairs. In both standards, pins 4 and 5 carry the solid blue wire and the white/blue wire (the blue pair), and pins 7 and 8 carry the brown wires - these positions are identical in both T568A and T568B. Pins 1, 2, 3, and 6 are where the orange and green pairs swap between the two standards. Therefore, the blue pair on pins 4 and 5 remains constant regardless of which wiring standard is used.
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