Final answer:
PoE (Power over Ethernet) is the technology that allows the electrical current necessary for the operation of devices to be carried by data cables instead of power cords.
Step-by-step explanation:
The technology that allows the electrical current necessary for the operation of each device to be carried by the data cables rather than by power cords is PoE (Power over Ethernet). With PoE, devices such as IP cameras, wireless access points, and VoIP phones can receive power and data through a single Ethernet cable. This eliminates the need for separate power cords and simplifies installation.