Axis ANVE Exam Practice Test Instant Access

Question 1

For an outdoor camera, what is the potential consequence of not using this connector?

AjSlow PTZ control

BIR and heaters won't work

CyVater ingress

DReduced bandwidth

Answer : C

For outdoor cameras, not using the proper connectors, such as weatherproof or waterproof connectors, can lead to water ingress. This can damage the camera's internal components, leading to malfunctions or complete failure of the device. Axis outdoor cameras are designed with specific connectors to ensure they are sealed against environmental factors like moisture, dust, and temperature extremes. According to Axis installation guides, ensuring the correct connectors are used is crucial for maintaining the camera's IP rating and long-term reliability.

Question 2

A varifocal lens

AMakes it possible to adjust the focal length like a zoom lens, but requires refocusing after adjusting the focal length.

BAllows the depth of field to be adjusted, making it possible to blur out the background for privacy protection or reducing distraction.

CCan rapidly change focus between a set of predefined positions, making it easy to move between different points of interest in the scene.

DIs a lens where the focus can be adjusted, as opposed to a fixed focus lens, making it possible to focus on objects close to the camera.

Answer : A

Question 3

Which network features are usually combined to prevent access to the surveillance network?

AIEEE 802.3ad link aggregation and HTTPS encryption

BIP subnets and VLANs

CRouter port forwarding and IP subnets

DRouter port forwarding and VLANs

Answer : B

IP subnets and VLANs are commonly used network features to prevent unauthorized access to the surveillance network. By segmenting the network using IP subnets, different portions of the network can be isolated, reducing the risk of cross-network attacks. VLANs (Virtual Local Area Networks) further enhance security by creating separate broadcast domains within the same physical network, thereby isolating surveillance devices from other network traffic and improving overall network security and performance.

Question 4

If using H.264 compression, in theory, what could a video containing no l-frames look like?

AThe first P-frame is visible during the whole video

BA black image is visible during the whole video

CAll moving objects will be visible

DAll non-moving objects will be visible

H264 compression uses I-frames (intra-coded frames) as reference points, with P-frames (predictive frames) and B-frames (bi-directional frames) encoding only the changes from the previous frames. If a video contained no I-frames, there would be no reference frame for decoding, resulting in an inability to display any image. This would theoretically result in a black image being visible during the whole video. Therefore, the correct answer is B. For more detailed information, refer to Axis Communications' technical notes on video compression.

Answer : B

Question 5

The term f-stop, or f-number,

ARelates the focal length of the lens to the zoom factor.

BMeasures the lens' capability to focus on objects at short distance.

CIs the end position of the focus motor in an autofocus system.

DMeasures the lens' capability to collect light.

Answer : D

When dealing with a poorly lit scene, adding light is the most effective option to improve image quality. Proper illumination ensures that the camera's sensor can capture clear and detailed images, reducing noise and enhancing visibility. While adjusting exposure settings, brightness, or changing camera placement can help, they are secondary to the fundamental requirement of adequate lighting.

Question 6

Which is a benefit of using VLANs and IP subnets?

AAn encrypted communication link is established over the internet, allowing surveillance video to be securely viewed off-site

BThe network provides end-to-end encryption to prevent malicious users from intercepting network traffic

CThe network will only allow access from authorized devices, eliminating the risk that malicious users disconnect cameras to intercept network traffic

DNetwork surveillance video can be kept separate from other network traffic, reducing the risk that malicious users will intercept it

Answer : D

Using VLANs and IP subnets in a network infrastructure helps segregate surveillance video traffic from other network traffic. This separation improves network security by limiting access to authorized devices only and reducing the risk of video interception by malicious users. It does not inherently provide encryption or establish encrypted communication links, but it enhances security by isolating sensitive video streams. Detailed explanations can be found in Axis Communications network design guides and security best practices documents.

Question 7

If the subject is 3 m (10 ft) away, what is the pixel density for a 1920x1080 camera?

A324 px/m (108 px/ft)

B162 px/m (54 px/ft)

CThe information is insufficient

D576 px/m (192 px/ft)

Answer : B

For a 1920x1080 camera, the pixel density at a distance of 3 meters (10 feet) can be calculated using the formula for pixel density (pixels per meter/foot). Given the resolution and distance, the pixel density is 162 pixels per meter (54 pixels per foot). Axis provides guidelines and tools for calculating pixel density to ensure the camera setup meets the required image quality for identification and recognition purposes in their technical resources and planning tools.

Axis Network Video ANVE Exam Practice Test