Which communication method allows devices to share power through the same electrical wiring as data?

The correct answer is Power line communication. This method enables devices to transmit data and share power over the existing electrical wiring in a building or infrastructure. Power line communication (PLC) utilizes the same electrical wiring that delivers power to convey data signals. This is particularly beneficial in situations where installing additional cabling is impractical or costly, allowing for easy integration of devices without the need for separate data lines.

In contrast, other methods listed do not share power through electrical wiring. Bluetooth is a wireless technology designed for short-range communication between devices. WiMAX is a wireless broadband access technology intended for providing high-speed internet over large areas, not utilizing electrical wiring for power sharing. Z-Wave is another wireless communication protocol primarily used for home automation, enabling devices to communicate but also not sharing power through electrical wiring. Thus, Power line communication stands out as the method capable of accomplishing both tasks simultaneously.