ANVE Exam Dumps - Axis Network Video Exam

A PoE switch with a power budget of 90 W can power 12 class 2 devices. Class 2 PoE devices typically require up to 7.5 W each. By dividing the total power budget (90 W) by the power requirement per device (7.5 W), we get 12 devices. This calculation aligns with the PoE standards defined in IEEE 802.3af/at, as outlined in Axis Communications' technical resources.

Quality of Service (QoS) in networking means that different data packets can have different priorities on the network. QoS mechanisms ensure that critical or time-sensitive data, such as video or voice, receive higher priority and guaranteed bandwidth over less critical data. This helps maintain the performance and reliability of essential services even when the network is congested. Axis Communications' technical guides on networking principles and QoS confirm this definition and its importance in IP surveillance systems.

A P-iris lens has better iris control in all lighting conditions. P-iris (Precise iris) lenses are designed to optimize the depth of field, contrast, and resolution of the camera by precisely controlling the iris opening, ensuring optimal image quality in varying light conditions. This technology is superior to manual, fixed, and DC-iris lenses. Axis Communications' product specifications highlight the benefits of P-iris lenses in maintaining image quality across different lighting scenarios.

Variable bitrate (VBR) is a video encoding method that adjusts the bitrate according to the complexity of the video scene. The primary advantage of VBR is that it maintains image quality, even in high-motion scenes, by allocating more bitrate when needed and reducing it during simpler scenes. This ensures consistent image quality while optimizing the use of bandwidth. Axis Communications’ documentation on video compression and bitrate management confirms the benefits of VBR in maintaining image quality.

Portcast technology can add audio and I/O functionality to a camera. It allows for the integration of additional functionalities such as audio inputs and outputs, as well as input/output ports for various sensors and devices. This feature enhances the capabilities of the camera beyond just video recording. This information is corroborated by Axis Communications' technical documentation and product guides.

"The field of view (FOV) of a camera is determined by the focal length of the lens and the size of the image sensor. A shorter focal length gives a wider FOV, while a larger sensor size also increases the FOV."

— Axis Communications Academy, Network Video Fundamentals, 2022

"FOV = 2 × arctan (sensor size / (2 × focal length))."

— Axis Lens Guide White Paper

"For stable operation in a VMS environment, it is recommended to assign static IP addresses to cameras to prevent changes that could disrupt video recording and management."

— Axis Communications Academy, Network Video Fundamentals, 2022

"Static IP addressing ensures cameras are always reachable at the same address by the VMS."

— Axis Installation Guide

If a PoE (Power over Ethernet) switch is unable to supply sufficient power to a network device, a midspan, also known as a PoE injector, should be used. A midspan is an external device that adds power to the Ethernet cable, thus providing the necessary power to the network device. This is particularly useful when existing network infrastructure cannot be upgraded to meet power requirements. According to Axis documentation, midspans are recommended to ensure adequate power delivery for network devices that require PoE.