GigE cameras have a single GigE RJ45 connection. The GigE cable carries image data and control signals. The connector is compatible with standard Cat5E and Cat6 network interface cables.
You do not need to power down the computer to connect or disconnect a camera, nor do you need to reboot the computer after this is done.
External power is required for the GigE cameras. Power over Ethernet (POE) is possible through 3rd party devices but is not currently supported. Contact firstname.lastname@example.org if POE is critical to your application.