Which of the following is used to install a network device when electrical outlets are...

Power over Ethernet (PoE) is specifically designed to power network devices without requiring a separate electrical outlet. According to CompTIA Core 1 (220-1201) networking hardware objectives, PoE allows both data and electrical power to be delivered over a single Ethernet cable from a PoE-capable switch or injector to the connected device.

PoE is commonly used for devices such as wireless access points, IP cameras, VoIP phones, and access control systems, especially in locations where installing electrical outlets is difficult, expensive, or impractical. This makes PoE an ideal solution for flexible and scalable network deployments.

WWAN (Wireless Wide Area Network) provides cellular-based network connectivity but does not supply power to devices. An ONT (Optical Network Terminal) converts fiber signals to Ethernet and requires its own power source. NFC (Near Field Communication) is a short-range wireless technology used for authentication and data exchange, not for powering network devices.

CompTIA highlights PoE as a key networking technology that simplifies installations by reducing cabling requirements and eliminating the need for local power outlets.