Power over Ethernet sends power through network cables. PoE (af) provides up to watts. PoE+ (at) provides up to watts. PoE++ (bt) reaches watts. Common PoE devices: IP phones, wireless access points, and cameras. The switch detects if the connected device needs power before sending it. Not all switches support PoE. Check your power budget.
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$ curl repovive.com/roadmaps/network-design/physical-and-data-link-fundamentals/poe-basics
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