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Networking Fundamentals · Foundational

PoE Plus (PoE+)

IEEE 802.3at, which delivers up to 30 W per port at the switch (25.5 W at the device) over two pairs.

Definition

PoE+ supports devices such as dual-radio access points and pan-tilt-zoom cameras that need more power than 802.3af provides. It is backward compatible with 802.3af devices.

Example

A Wi-Fi 6 access point requires PoE+ to enable all radios.

Exam tip

af = 15.4 W, at = 30 W, bt = 60 W (Type 3) or 90 W (Type 4).

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