When installing and deploying an AP, the AP can use an Ethernet cable for PoE power supply. Which of the following descriptions of the PoE protocol are correct? (Multiple choice)

Question

Options

• AThe maximum output power of a power supply device that supports the PoE+ protocol is 30 watts
• BThe maximum output power of the power supply equipment supporting the POE+ protocol is 60
• CThe maximum output power of the power supply equipment supporting the POE protocol is 15.4
• DThe power supply standard of PoE++ technology is IEEE 802.3bt

• A
  74% (20)
• B
  26% (7)

Explanation

Options A, C, and D are correct because each accurately reflects the IEEE PoE standard specifications: the original PoE standard (IEEE 802.3af) delivers a maximum of 15.4W (C), PoE+ (IEEE 802.3at) delivers a maximum of 30W (A), and PoE++ is indeed governed by IEEE 802.3bt (D). Option B is the distractor - it incorrectly assigns 60W to PoE+, when 60W (and up to 100W) actually belongs to PoE++, not PoE+; confusing these two is a classic exam trap. A helpful way to remember the progression: think af = 15.4W → at = 30W → bt = 60W+, where the letters go up alphabetically alongside the wattage - af is feeble, at is ample, bt is beefy.

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