A small company is upgrading its phone system with IP phones. These phones can be used just by plugging into a network port in the offices. Which technology would support the IP phones?
- wireless power transfer
- Power over Ethernet
- NFC
- UPnP
Explanation: Power over Ethernet (PoE) is implemented through switches. A PoE switch transfers small amounts of DC current over an Ethernet cable, along with the data, to power PoE devices. Low voltage devices that support PoE, such as IP phones, can be powered through the Ethernet cable.