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What statement about 802.3af Power over Ethernet (802.3, Clause 33) is true?

What statement about 802.3af Power over Ethernet (802.3, Clause 33) is true?

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A.
If a dual-radio access point requires 12W to operate, a PoE power source supplies 15.4W to
the powered interface.

B.
802.3af-compliant endpoint and midspan PSE devices support 10/100 as well as Gigabit
(1000Base-T) data rates.

C.
Class 1 powered devices may use a maximum of 29W of power.

D.
802.3af-compliant Ethernet switches must be able to simultaneously support class 3 powered
devices on every powered interface.

E.
There are two classes of 802.3af PSEs: Type A supports up to 7W and Type B supports up to
15W of supplied power.

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