Which color combination is used for pins 1 and 2 in the TIA-568-B standard?

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Multiple Choice

Which color combination is used for pins 1 and 2 in the TIA-568-B standard?

Explanation:
In TIA-568-B, the orange pair is assigned to the first two pins. That means pin 1 carries White/Orange and pin 2 carries Orange. The four twisted pairs are mapped to the eight pins as 1–2 (orange), 3–6 (green), 4–5 (blue), and 7–8 (brown). This fixed ordering keeps each pair intact through terminations, which supports proper differential signaling and minimizes crosstalk. For 10/100 Mbps Ethernet, the data uses the orange and green pairs, while gigabit Ethernet uses all four pairs.

In TIA-568-B, the orange pair is assigned to the first two pins. That means pin 1 carries White/Orange and pin 2 carries Orange. The four twisted pairs are mapped to the eight pins as 1–2 (orange), 3–6 (green), 4–5 (blue), and 7–8 (brown). This fixed ordering keeps each pair intact through terminations, which supports proper differential signaling and minimizes crosstalk. For 10/100 Mbps Ethernet, the data uses the orange and green pairs, while gigabit Ethernet uses all four pairs.

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