Which of the following description of the PoE power supply is correct?
A . PoE power supply is through the AC adapter to the AP power
B . if use PoE adapter, power supply, need to ensure that PoE adapter and cable not more than 80 meters between the AP
C . AP6610DN is preferred PoE power supply
D . If PoE power supply to meet the 802.3at standard that means each power supply port power supply can reach 30W
Answer: D