Which PoE designation contains the highest per-port power in the described system?

Which PoE designation contains the highest per-port power in the described system?

• A. PoE
• B. PoE++ Type 4
• C. PoE+
• D. PoE Type 3

Answer: (B)

Power over Ethernet standards define how much wattage can be pushed to a device on each port, and newer standards allow more power. The early PoE standard provides up to about 15.4 W per port, with around 12–13 W typically usable after cable losses. PoE+ increases that to roughly 30 W per port. The newer Type 3 (802.3bt Type 3) can deliver up to about 60 W per port, and Type 4 (PoE++) goes up to roughly 90 W per port. Therefore, the highest per-port power among these options is PoE++ Type 4, capable of up to around 90 W per port. Real-world delivered power depends on cable length, cable type, and the device’s actual power needs, but Type 4 offers the largest power ceiling.

Power over Ethernet standards define how much wattage can be pushed to a device on each port, and newer standards allow more power. The early PoE standard provides up to about 15.4 W per port, with around 12–13 W typically usable after cable losses. PoE+ increases that to roughly 30 W per port. The newer Type 3 (802.3bt Type 3) can deliver up to about 60 W per port, and Type 4 (PoE++) goes up to roughly 90 W per port. Therefore, the highest per-port power among these options is PoE++ Type 4, capable of up to around 90 W per port. Real-world delivered power depends on cable length, cable type, and the device’s actual power needs, but Type 4 offers the largest power ceiling.