IEEE802.3 af 10/100/1000Mbps Rj45 Port PoE Splitter 14W Ethernet POE Adapter DC 5.1V Separator 38V to 57V POE Splitter PCBA - AliExpress
File:Formato PDU Ethernet vs. IEEE 802.3.png - Wikimedia Commons
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Ethernet (IEEE 802.3): Definition, history, and terms - IONOS