What does PoE (Power over Ethernet) allow when connecting a device?

Power over Ethernet (PoE) is a technology that enables the transfer of both electrical power and data over standard Ethernet cables. This capability is particularly advantageous in networking scenarios where it can simplify installations and reduce the need for additional power outlets.

When you connect a PoE-enabled device, such as a security camera or a wireless access point, it receives power via the same cable that transmits data. This dual functionality not only streamlines the setup but also allows for flexibility in placing devices in locations where power outlets may be limited or unavailable. For example, you can install a network camera outdoors without requiring a nearby electrical source, as the Ethernet cable can be routed from a PoE switch or injector located elsewhere.

The other options do not accurately represent PoE’s purpose. Providing data transfer only fails to capture the key aspect of power delivery, while requiring a separate power outlet contradicts the very essence of PoE. Disabling data transfer capabilities is also incorrect, as PoE maintains the data flow alongside power delivery. Thus, the correct understanding of PoE is that it delivers both power and data over the same cable, facilitating more versatile and efficient network setups.