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Networking Fundamentals · Intermediate

Powered Device (PD)

A device that receives operating power over Ethernet cabling, such as an IP phone, camera or access point.

Definition

A PD presents a detection signature and a power class to the PSE. If the PSE cannot provide enough power, the PD may operate in reduced mode or fail to boot.

Example

A security camera is a PD powered by the switch.

Exam tip

A device that powers on but reboots or disables radios may be under-powered by PoE.

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