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Which of the following technologies will allow you to install networking devices that require power to operate in an area with no power outlets?

A PoE.

Power over Ethernet (PoE) allows the placement of equipment in locations that would otherwise be inaccessible. In twisted pair wiring, only four of the eight wires are used for communication. Power is transmitted over the wires that are not utilized for communication. If neither end of the line supports PoE, an injector can be used to add power to the line as it travels to its destination. Compatibility is critical, because the amount of power that may be transmitted this way is limited. Although Ethernet over Power (EoP) is not one of the CompTIA A+ objectives, it does require special devices to deliver Ethernet communications over existing wire, such as in a household. A wireless access point (WAP) is a device that allows wireless devices to connect to a wired network or to each other. PoE is supported by some WAPs. A hub is a straightforward network connectivity device.

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