Which statement about PoE wattage across standards is accurate?

Which statement about PoE wattage across standards is accurate?

• A. All PoE standards deliver the same wattage.
• B. Only PoE delivers power, not PoE+ or PoE++.
• C. Power levels increase with newer standards, with PoE++ supporting up to 90 W.
• D. PoE+ provides more power than PoE++.

Answer: (C)

Power levels scale up with newer PoE standards. The first PoE standard provides up to about 15.4 W at the power source, PoE+ increases that to around 30 W, and the latest PoE++ (IEEE 802.3bt) pushes higher still, with the most capable mode delivering up to about 90 W per port. Because each newer standard allows more power to be drawn over the Ethernet cable, saying that PoE++ can reach up to 90 W per port is accurate. In practice, the exact delivered power also depends on cable length and quality, but the general trend is clear: newer standards enable higher wattage.

Power levels scale up with newer PoE standards. The first PoE standard provides up to about 15.4 W at the power source, PoE+ increases that to around 30 W, and the latest PoE++ (IEEE 802.3bt) pushes higher still, with the most capable mode delivering up to about 90 W per port. Because each newer standard allows more power to be drawn over the Ethernet cable, saying that PoE++ can reach up to 90 W per port is accurate. In practice, the exact delivered power also depends on cable length and quality, but the general trend is clear: newer standards enable higher wattage.