Axis Communications Updated ANVE Exam Questions and Answers by cataleya

Using PoE (Power over Ethernet) to power cameras helps keep them running during a power outage because PoE cameras are centrally powered from the Ethernet switches, which are often backed up by an uninterrupted power supply (UPS). This means that in the event of a power failure, the UPS can provide temporary power to the switches and, consequently, to the connected PoE cameras, ensuring continuous operation.

The f-stop value of a lens will get higher if you zoom in. This is true because as the focal length increases (when zooming in), the lens aperture typically becomes smaller, resulting in a higher f-stop value. This change affects the amount of light entering the camera, which is an important consideration for PTZ (Pan-Tilt-Zoom) cameras when they are used in varying lighting conditions.