MPX, IP, and wireless security cameras are all powered in different ways. All ansjer MPX security cameras include a RG59 BNC cable.
This cable splits into two ends, one for video and one for power. This allows you to plug the camera in near the DVR, rather than an outlet near the camera itself. IP cameras do not need to be plugged in close to the camera either.
They receive their power over the Ethernet cable that is connected to the NVR. This is thanks to Power-over-Ethernet technology. Wireless cameras, on the other hand, are required to be plugged into a nearby power outlet (the wireless aspect of wireless cameras takes place between the camera and DVR).