In the terminology of PoE, what does AP belong to?

Question

Options

• APSE
• BPD
• CPI
• DPSU

• A
  8% (2)
• B
  72% (18)
• C
  4% (1)
• D
  16% (4)

Explanation

In Power over Ethernet (PoE), an Access Point (AP) is classified as a PD, or Powered Device, because it receives electrical power delivered over Ethernet cable from a PoE switch or injector. The AP does not supply power to the network; it consumes it, which is the defining characteristic of a PD under IEEE 802.3 PoE standards.

Option A (PSE, Power Sourcing Equipment) is wrong because PSE refers to the device that provides power, such as a PoE-capable switch or midspan injector. Option C (PI, Power Interface) refers to the physical port or interface through which power is delivered, not a category of end device. Option D (PSU, Power Supply Unit) is a general computing term for an internal power supply and is not a PoE-specific classification.

Memory tip: Think of PD as "Plugged-in Device" - anything that plugs into the network and draws power from it, like an AP, IP camera, or VoIP phone, is a PD. The PSE is the source; the PD is the sink.

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