A technician is replacing legacy wireless access points that were powered by IEEE 802.3af PoE (maximum 12.95 W delivered). The new access points require a minimum of 25 W at the device. Which PoE standard must the access-layer switches support to meet this requirement?
IEEE 802.3at-commonly called PoE+-increases the maximum power budget per port to 30 W at the power-sourcing equipment (PSE) and guarantees up to 25.5 W at the powered device (PD). This meets the 25 W requirement. IEEE 802.3af supplies only up to 12.95 W at the PD, which is insufficient. IEEE 802.3bt Type 3 can also meet the need but exceeds it, and IEEE 802.3ad is a link-aggregation standard, not a PoE specification.
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