Regarding the two major PoE standards, the following statement is incorrect (). (Select 2 Answers)

Regarding the two major PoE standards, the following statement is incorrect (). (Select 2 Answers)

A. The A.802.af standard was formulated in 2009, and the maximum output power is 30W

B. 802.at supports four power levels and only supports Category 5 lines

C. 802.af, also known as PoE+, can be compatible with 802.a devices

D. 802.at, also known as PoE+, can be compatible with 802.a devices

Answer: A,C