Free Axis Communications ANVE Practice Exam with Questions & Answers | Set: 5

To utilize IEEE 802.1X for connecting a camera to the network, the following are required:

A. An Ethernet switch with support for IEEE 802.1X, which ensures that only authorized devices can connect to the network.

C. A RADIUS server, which is used to manage authentication, authorization, and accounting (AAA) for network access control.

These components are essential for setting up secure network access using IEEE 802.1X.

A MAC (Media Access Control) address is a unique physical address assigned to network interfaces for communication on the physical network segment. It is used for direct data exchange within a network, ensuring that data packets are delivered to the correct device. Unlike IP addresses, MAC addresses operate at the data link layer (Layer 2) of the OSI model and are hard-coded into the network interface card (NIC) by the manufacturer. References: Axis Communications networking guides and standard networking principles.

Axis helps prevent attackers from deceiving system owners into installing altered firmware by using signed firmware. Signed firmware ensures that only authentic and unaltered firmware can be installed on the device. This process involves cryptographic signatures that verify the integrity and authenticity of the firmware, thus preventing malicious code from being introduced into the system.

A system designer can compare the light sensitivity of network cameras from different manufacturers by checking the specified lux values of the cameras. Lux is a unit of measurement for illuminance, indicating how much light is needed for the camera to produce a usable image. Lower lux values indicate better low-light performance. While field testing can also be useful, lux values provide a standardized and quick reference for comparison. References: Axis Communications product specifications and industry standards on light sensitivity.

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When recording a night scene with IR, using a day-and-night camera without an IR-corrected lens can cause the focus to shift. This happens because IR light and visible light have different wavelengths and refract differently through the lens. An IR-corrected lens is designed to handle both types of light without causing a focus shift, ensuring sharp images in both day and night conditions. References: Axis Communications product guides on day-and-night cameras and IR-corrected lenses.

PTZ cameras use lasers to measure the distance to the target, which allows for quick and accurate focusing. The laser range finder determines the precise distance between the camera and the subject, enabling the camera to adjust its focus optimally. This technology ensures that the camera can focus rapidly and accurately, even in challenging lighting conditions or when the target is moving. Axis Communications' technical specifications for PTZ cameras confirm that laser technology is employed to enhance focus performance by providing target distance information.

ACAP (Axis Camera Application Platform) analytics run directly on the device. This means that the processing and analysis of data occur on the camera itself, rather than on a separate server or in the cloud. Running analytics on the device reduces the need for additional hardware and network bandwidth, and it allows for faster decision-making and real-time alerts. This information is confirmed by Axis Communications' documentation on ACAP.

Zipstream’s Dynamic GOP (Group of Pictures) conserves bandwidth and storage by skipping new I-frames if the scene is unchanged. I-frames (intra-coded frames) are larger than P-frames (predictive frames) and B-frames (bi-directional frames) because they contain the full image data. By reducing the frequency of I-frames when there is no motion or change in the scene, Zipstream significantly lowers the data rate without compromising image quality. Axis documentation explains how Zipstream’s Dynamic GOP feature optimizes video encoding to conserve resources effectively.

When using an external IR illuminator with a beam angle significantly narrower than the field of view, the exposure may be uneven. This can result in parts of the image being overexposed (too bright) while other parts remain underexposed (too dark). Ensuring that the beam angle of the IR illuminator matches the field of view of the camera is essential for achieving uniform illumination across the entire surveillance area.References: Axis Communications IR Illumination Guide

A 1080p camera with a 1/2" sensor typically has larger pixels compared to a 4K camera with a 1/2" sensor. Larger pixels can capture more light, which improves performance in low-light conditions and enhances image quality by reducing noise. This is a critical advantage when clear image capture in various lighting conditions is necessary. Axis documentation on camera sensors and image quality highlights that larger pixels provide better light sensitivity and dynamic range.