A router is a device used to forward data from one Local Area Network (LAN) to another. It operates at the network layer (Layer 3) of the OSI model and uses IP addresses to determine the best path for data packets to travel between networks. Routers connect multiple networks, manage traffic, and facilitate communication between different network segments. References: Axis Communications network design documentation and standard networking resources.
Question # 35
Which dome type might negatively affect the image quality?
A smoked dome might negatively affect the image quality. Smoked domes can reduce the amount of light reaching the camera sensor, leading to darker and less clear images. While they offer additional privacy and reduce the visibility of the camera’s direction, they can compromise the overall image clarity and brightness. Axis Communications' documentation on dome camera housings and their impact on image quality confirms this.
Question # 36
Which is true about H.264, FPS, and bitrate?
Options:
A.
Reducing the FPS by 50% will reduce the bitrate by exactly 50%
B.
Reducing the FPS by 50% will have no impact on the bitrate
C.
Reducing the FPS by 50% will reduce the bitrate by less than 50%
D.
Reducing the FPS by 50% will reduce the bitrate by more than 50%
Reducing the frames per second (FPS) by 50% will reduce the bitrate by less than 50%. This is because the bitrate is influenced not only by the frame rate but also by the complexity of the image content and the compression efficiency. While lowering the FPS reduces the amount of data being processed, other factors like scene complexity and motion still impact the overall bitrate. Axis documentation on video compression and bitrate management indicates that halving the FPS typically results in a less than proportional reduction in bitrate.
The AXIS V5938 is a professional video broadcasting camera designed specifically for high-quality video streaming and broadcasting applications. It offers features such as 4K Ultra HD resolution, powerful zoom capabilities, and advanced image processing, making it ideal for live broadcasts, webcasting, and other professional video applications. Axis documentation highlights the V5938 as a top choice for video broadcast due to its superior image quality and streaming capabilities.
Question # 38
Typically, a system designer calculates the pixel density based on
Typically, a system designer calculates the pixel density based on the horizontal resolution and the field of view. Pixel density is crucial in determining the level of detail a camera can capture in a specific area. Horizontal resolution refers to the number of pixels along the horizontal axis of the image sensor, while the field of view is the extent of the observable area captured by the camera. This calculation helps in ensuring that the camera setup meets the surveillance requirements.
[References: Axis Communications Design Tool, ]
Question # 39
What advantage does Axis Sharpdome technology provide for PTZs?
Axis Sharpdome technology provides the advantage of enabling PTZ cameras to see above the horizon. This innovative design allows for 360-degree coverage and significantly enhances the field of view, making it possible to monitor areas both above and below the camera’s position without distortion. This feature is particularly beneficial for applications requiring extensive coverage and flexible monitoring angles. Axis Communications' product details on Sharpdome technology highlight this capability.
Question # 40
How come the top image can have more motion blur than the bottom one?
Options:
A.
The pixel density is significantly higher in the center of the camera's field of view, compared to the edges
B.
An object moving perpendicularly to the camera changes many more pixels than an object moving towards the camera
C.
The placement of the illuminators in this scene allows more light to fall on objects placed in the center of the scene
D.
An object moving towards the camera stays longer in the camera's field of view, allowing for focus adjustments
"Motion blur is more prominent when an object moves perpendicularly (across) to the camera because it traverses more pixels per frame, compared to an object moving toward or away from the camera."
— Axis Communications Academy, Network Video Fundamentals, 2022
"Perpendicular movement causes greater pixel change in each frame, resulting in more noticeable motion blur."
"Lightfinder technology provides Axis cameras with extreme light sensitivity, enabling them to deliver high-quality, full color images in extremely low-light conditions."
— Axis Lightfinder Technology Overview
"Lightfinder technology allows for color images in situations where other cameras would only produce black-and-white."
— Axis Communications Academy, Network Video Fundamentals, 2022
[References:, , Axis Web Article: Lightfinder Technology, , Axis Communications Academy, Network Video Fundamentals, 2022 (p. 37), ]
"The image shows a coaxial cable terminated with a BNC (Bayonet Neill–Concelman) connector. This type of connection is commonly used for analog video and some specialized network applications such as Axis video encoders."
— Axis Communications Academy, Network Video Fundamentals, 2022
"BNC connectors are standard for coaxial cabling in CCTV and video encoder installations."
— Axis Video Encoder Product Page
[References:, , Axis Communications Academy, Network Video Fundamentals, 2022 (p. 29), , Axis Video Encoder Product Page]
Question # 43
What feature can be used to ensure that the video has sufficient resolution?
"The pixel counter tool allows you to verify that the resolution at a given distance meets identification, recognition, or detection requirements for a surveillance scene."
— Axis Communications Academy, Network Video Fundamentals, 2022
"Axis cameras have a built-in pixel counter feature, helping installers confirm if a scene has the needed pixel density."
