The maximum switch port power in a PoE++ Type 4 system is ___.

The maximum switch port power in a PoE++ Type 4 system is ___.

• A. 15.4W
• B. 100W
• C. 60W
• D. 30W

Answer: (B)

PoE power levels rise with each generation to support higher‑power devices. PoE++ Type 4 is designed to push the per‑port capability much higher than earlier standards. The switch port in a PoE++ Type 4 system is implemented to deliver up to 100W on a single port, with up to around 90W actually available to the powered device after overhead and negotiation. That headroom accommodates voltage drop, safety margins, and the Type 4 negotiation described in IEEE 802.3bt. So the maximum switch port power is 100W.

PoE power levels rise with each generation to support higher‑power devices. PoE++ Type 4 is designed to push the per‑port capability much higher than earlier standards. The switch port in a PoE++ Type 4 system is implemented to deliver up to 100W on a single port, with up to around 90W actually available to the powered device after overhead and negotiation. That headroom accommodates voltage drop, safety margins, and the Type 4 negotiation described in IEEE 802.3bt. So the maximum switch port power is 100W.