Which of the following is a common use for Power over Ethernet technology?

Power over Ethernet (PoE) technology is predominantly used to deliver both power and data over a single Ethernet cable. This technology is particularly beneficial for devices that are installed in locations where it might be cumbersome or impractical to run separate power lines.

In the context of providing power to devices like IP cameras, PoE simplifies the installation process significantly. IP cameras require a power source, and using PoE allows them to operate without the need for additional electrical wiring, making them easier to install in various locations such as ceilings, walls, or outdoor environments. This capability is crucial in surveillance and security applications where reliable power and connectivity are necessary.

While charging cell phones, connecting devices to the internet, and battery charging are valid uses of technology, they do not specifically leverage the unique attributes of Power over Ethernet, which shines in powering networked devices like IP cameras.