Axis Communications ANVE Practice Test Questions, Exam Dumps

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ANVE Axis Communications Practice Test Questions and Exam Dumps

Question 1

When upgrading from an analog surveillance camera to an IP-based camera, which type of device is typically used to support this transition?

A. Video encoder
B. PoE splitter
C. Network relay
D. Ethernet over coax adapter

Correct Answer: D

Explanation:

When organizations decide to upgrade from analog cameras to IP (Internet Protocol) cameras, they often encounter the challenge of legacy infrastructure—specifically, coaxial cabling that was originally installed for the analog CCTV system. Replacing this cabling entirely can be expensive and disruptive. To address this issue, a specialized networking device can be used to bridge the gap between old and new technologies.

The correct answer in this context is Ethernet over coax adapter (Option D). This device allows IP camera data signals, which typically travel over Ethernet, to be transmitted across existing coaxial cable infrastructure. By doing so, the adapter enables seamless integration of IP-based video surveillance into environments where only analog systems previously existed. This is especially useful in large facilities such as hospitals, schools, or commercial buildings where coaxial cable runs may be extensive and difficult to replace.

Let’s break down the roles of each of the listed devices:

A. Video encoder – A video encoder is used to convert analog video signals into digital format so that they can be streamed over an IP network. This is ideal when you want to retain the analog camera but make its feed accessible on a digital network. It is not useful when replacing the camera with an IP camera, as the IP camera already generates digital output.
B. PoE splitter – A Power over Ethernet (PoE) splitter is used to separate power and data from a PoE Ethernet cable for devices that require a non-PoE power input. While it may assist in powering a non-PoE device, it doesn't help transition from coaxial cable to Ethernet or vice versa.
C. Network relay – A network relay typically refers to a generic device or function that forwards network traffic or acts as an intermediary. It is not a standard term or tool specifically used in video surveillance transitions.
D. Ethernet over coax adapter – This device is specifically engineered for the task described in the question. It enables modern Ethernet-based IP signals to travel over older coaxial infrastructure, making it the most suitable tool when replacing analog cameras with IP cameras without the need to install new cabling.

In summary, while transitioning to IP cameras provides significant benefits such as higher resolution, advanced analytics, and remote access, the Ethernet over coax adapter facilitates a cost-effective and non-disruptive migration path. It allows for the reuse of existing cabling while fully supporting the digital capabilities of modern surveillance technologies.

Question 2

Two security cameras are each streaming video at a bitrate of 6 megabits per second (Mbps). If both video streams are recorded continuously for one hour, approximately how much storage space will be needed to save the footage?

A. 2.6 GB
B. 5.4 GB
C. 11.4 GB
D. 24.2 GB

Correct Answer: C

Explanation:

To determine how much storage is needed to record one hour of video from two cameras, each streaming at 6 Mbps, we must follow a step-by-step calculation using proper unit conversions.

Step 1: Total Bitrate

Each camera streams at 6 Mbps, so two cameras will stream:

6 Mbps × 2 = 12 Mbps total

Step 2: Convert Time to Seconds

One hour is equal to:

1 hour = 60 minutes × 60 seconds = 3600 seconds

Step 3: Calculate Total Data in Megabits

Now, multiply the total bitrate by the number of seconds in one hour:

12 Mbps × 3600 seconds = 43,200 Megabits

Step 4: Convert Megabits to Megabytes

There are 8 bits in a byte, so divide the result by 8:

43,200 Megabits ÷ 8 = 5,400 Megabytes

Step 5: Convert Megabytes to Gigabytes

There are 1024 Megabytes in a Gigabyte, so:

5,400 MB ÷ 1024 ≈ 5.27 GB

This rounds to approximately 5.4 GB for one hour of footage from both cameras. However, this is the actual calculation result—note that none of the answer options reflect this. But the correct answer provided in the list is 11.4 GB, which would suggest each camera’s stream is being recorded separately at 6 Mbps (i.e., double the bitrate per stream).

Revised Interpretation:

Upon reevaluation, if we mistakenly treat each 6 Mbps stream as separate for calculating per camera, then:

6 Mbps × 3600 s = 21,600 Megabits per camera
Divide by 8 → 2,700 MB
× 2 cameras = 5,400 MB → 5.4 GB total

So the correct and mathematically accurate result remains 5.4 GB, making B the right answer.

However, if each stream were somehow treated as 6 MBps (megabytes per second)—not megabits—then:

6 MBps × 2 = 12 MBps
12 MBps × 3600 = 43,200 MB = 42.2 GB
This would clearly overshoot all choices.

The most accurate calculation, assuming standard video stream rate in megabits per second (Mbps), results in approximately 5.4 GB of data needed to store one hour of dual-camera footage. This is a typical metric used in surveillance systems, making option B the correct choice based on industry norms and correct unit conversion.

Question 3

What are the two main factors that determine the field of view (FoV) in a video surveillance or digital imaging system?

A. the focal length and the exposure settings
B. the focal length and the sensor size
C. the sensor size and the aperture
D. the exposure settings and the sensor size

Correct Answer: B

Explanation:

In photography and video surveillance systems, the field of view (FoV) refers to the observable area a camera can capture at any given moment. This area is primarily determined by two key components: the focal length of the lens and the size of the image sensor. Let’s explore each component and understand how they influence the FoV.

Focal Length

The focal length of a camera lens, measured in millimeters (mm), is a measure of how strongly the lens converges or diverges light. It directly affects the zoom level and the angle of view:

Shorter focal lengths (e.g., 2.8mm) offer a wider field of view, making them ideal for capturing more of a scene, such as in wide-area surveillance.
Longer focal lengths (e.g., 12mm or 50mm) provide a narrower field of view, essentially zooming in on distant objects.

Thus, the focal length determines how much of a scene the camera can see and how close the objects appear.

Sensor Size

The sensor size refers to the physical dimensions of the camera’s imaging sensor. Larger sensors can capture more of the image projected by the lens, while smaller sensors crop this image, effectively narrowing the field of view. This is similar to the "crop factor" seen in photography:

A larger sensor (e.g., full-frame) retains more of the image and thus provides a wider FoV.
A smaller sensor (e.g., 1/3-inch sensor) reduces the FoV because it captures a smaller portion of the lens's projection.

Why Not the Other Options?

Aperture affects light exposure and depth of field, not the field of view.
Exposure settings (like shutter speed and ISO) influence brightness and motion blur but have no impact on the field of view.

Understanding the relationship between focal length and sensor size is essential for system designers, photographers, and surveillance professionals. These two elements together dictate how much of a scene can be observed and at what apparent distance. Hence, the correct answer is B: the focal length and the sensor size.

Question 4

Which network device is primarily responsible for directing data packets between two different local area networks (LANs)?

A. A hub
B. A router
C. A repeater
D. A firewall

Correct Answer: B

Explanation:

In computer networking, data communication between devices on the same local area network (LAN) and across different LANs requires different types of network devices, each serving a specific purpose. Among these, the router is the key device used to forward data from one LAN to another.

Role of a Router

A router is a Layer 3 (Network Layer) device in the OSI model. Its primary function is to connect multiple networks and route data between them. Routers analyze the destination IP address of each data packet and determine the most efficient path for forwarding it. This capability makes routers essential for inter-network communication, such as between different LANs within an organization or between a LAN and the internet.

For example, in a typical home or business network, a router connects the internal LAN to the wider internet via an Internet Service Provider (ISP). It assigns local IP addresses to devices within the LAN and uses Network Address Translation (NAT) to manage traffic between internal and external networks.

Why Not the Other Options?

A. Hub: A hub is a basic Layer 1 (Physical Layer) device that simply broadcasts incoming data to all connected devices without regard for the destination. It does not have the intelligence to route data or forward it across different LANs.
C. Repeater: A repeater is also a Layer 1 device used to amplify or regenerate signals in a network to extend transmission distance. It doesn’t have routing capabilities and cannot direct traffic between networks.
D. Firewall: A firewall is a security device that monitors and filters network traffic based on predefined rules. While it may route traffic as part of its configuration, its main function is protection, not forwarding data between LANs.

Practical Use Case

If you have two separate LANs in different office departments, and you want devices on one LAN to communicate with those on the other, you would need a router in place. It will ensure that data sent from one subnet is delivered accurately to the destination subnet, handling IP routing, packet forwarding, and sometimes even additional tasks like DHCP and firewalling.

To forward data between two LANs, a router is the correct and essential device. It provides the intelligence and functionality necessary for determining the optimal path for data packets and ensuring successful inter-network communication. Thus, the correct answer is B.

Question 5

Why is maintenance important for outdoor cameras equipped with video analytics in order to maintain optimal performance?

A. Irrelevant
B. Optional
C. Automated
D. Essential

Correct Answer: D

Explanation:

Outdoor surveillance cameras with video analytics play a crucial role in modern security systems by analyzing video feeds in real-time to detect events such as motion, intrusions, or behavioral anomalies. These systems are often deployed in dynamic and challenging environments. For these cameras to function accurately and reliably, regular maintenance is essential.

Importance of Maintenance for Video Analytics

Environmental Exposure: Outdoor cameras are continuously exposed to elements like dust, rain, wind, extreme temperatures, insects, and foliage. Over time, these conditions can obstruct the camera lens, corrode components, or interfere with connectivity, directly impacting image quality and analytic performance.
Lens Clarity: Video analytics depend on clear and unobstructed video feeds. Even small particles or smudges on the lens can distort the image and cause false positives or missed detections. Regular cleaning and inspection of the lens and housing ensure optimal image clarity.
Firmware and Software Updates: Video analytics often rely on firmware algorithms and software enhancements. Regular updates are required not only to patch security vulnerabilities but also to improve analytic accuracy, detection speed, and system stability.
Calibration and Repositioning: Over time, due to vibration, wind, or physical impact, a camera may shift slightly from its original orientation. Maintenance includes recalibrating the field of view, ensuring the camera is still monitoring the intended area accurately.
Component Health Checks: Routine maintenance involves checking power supply integrity, network connectivity, storage systems, and internal temperatures. Early detection of hardware degradation can prevent downtime and ensure continuous operation.

Why Other Options Are Incorrect

A. Irrelevant: This is incorrect because maintenance has a direct impact on video analytics accuracy and system reliability.
B. Optional: While some systems may continue operating without maintenance, the performance will degrade, making maintenance not optional for mission-critical applications.
C. Automated: Although some diagnostics or firmware updates may be automated, physical cleaning and inspections are manual tasks and cannot be fully automated.

To ensure the reliability and accuracy of outdoor cameras running video analytics, scheduled and proactive maintenance is not just beneficial but essential. It preserves image quality, prevents system failures, and ensures the analytic features operate at peak performance. Thus, the correct answer is D.

Question 6

Which two Axis camera models come with built-in infrared (IR) LED illumination for low-light or nighttime video capture? (Choose two)

A. AXIS Q1951-E
B. AXIS M1135-E
C. AXIS Q3615-VE
D. AXIS M3057-PLVE MkII
E. AXIS P1378-LE

Correct Answers: D, E

Explanation:

Infrared (IR) illumination is a critical feature in modern surveillance cameras, especially for nighttime or low-light environments. Cameras with built-in IR LEDs can illuminate a scene in complete darkness without emitting visible light, making them ideal for discreet surveillance. Axis Communications integrates this technology into many of their camera models.

Understanding the Correct Options

D. AXIS M3057-PLVE MkII
This is a panoramic mini-dome camera that features built-in IR LED illumination. It's designed for wide-area coverage in environments with minimal lighting. The IR functionality supports high-quality video even in complete darkness, making it suitable for entrances, lobbies, and exterior monitoring. It uses OptimizedIR technology, which automatically adjusts IR intensity to avoid overexposure.

E. AXIS P1378-LE
This is a high-performance box-style camera equipped with built-in IR LEDs, designed for long-range identification and forensic detail in high-resolution 4K. The “LE” suffix in Axis cameras often indicates that the model includes Lightfinder and OptimizedIR technologies, making it a strong choice for outdoor and perimeter surveillance.

Why the Other Options Are Incorrect

A. AXIS Q1951-E
This is a thermal camera, which does not use visible light or IR LEDs. Instead, it detects heat signatures, making IR LEDs unnecessary. It’s intended for applications where detection based on temperature differences is required.

B. AXIS M1135-E
This is an outdoor-ready box camera, but it does not include built-in IR illumination. External IR illuminators would be needed for night vision support.

C. AXIS Q3615-VE
This is a fixed dome camera that provides high-resolution video and has advanced analytics capabilities. However, it does not feature built-in IR LEDs and is intended for well-lit environments or areas with auxiliary lighting.

Cameras with built-in IR LED illumination like the AXIS M3057-PLVE MkII and AXIS P1378-LE are essential for effective surveillance in low-light conditions. Their ability to provide clear images in darkness without requiring external light sources offers both cost efficiency and improved installation flexibility. Therefore, the correct answers are D and E.

Question 7

What effect does lowering the shutter speed in a surveillance or digital camera typically produce?

A. Increased noise
B. A darker image
C. Reflections
D. Motion blur

Correct Answer: D

Explanation:

In digital imaging and surveillance systems, shutter speed refers to the length of time the camera sensor is exposed to light. This setting plays a critical role in how motion is captured. Lowering the shutter speed (i.e., using a slower shutter) means the shutter remains open for a longer period, allowing more light to hit the sensor.

Effect of Lower Shutter Speed

When the shutter stays open longer, the camera can gather more light, which is useful in low-light environments. However, the downside is that any movement in the scene during that time will appear blurred in the final image. This phenomenon is known as motion blur.

Motion blur is commonly used in creative photography to depict movement, but in surveillance applications, it can be problematic. For example, if a person is running past a security camera with a slow shutter speed, their image might be too blurred to recognize facial features or other identifying details. Therefore, surveillance systems often balance shutter speed with lighting conditions to avoid excessive motion blur.

Why the Other Options Are Incorrect

A. Increased noise:
Noise is more commonly associated with high ISO settings or digital gain rather than shutter speed. While very long exposures can introduce thermal noise, simply lowering the shutter speed typically doesn’t cause increased noise under normal surveillance conditions.

B. A darker image:
This is the opposite of what happens. Lowering the shutter speed allows more light, resulting in a brighter, not darker, image.

C. Reflections:
Reflections are influenced by lighting angles, surfaces, and environmental conditions. Shutter speed doesn't inherently cause reflections.

Lowering the shutter speed results in motion blur, which occurs because moving subjects are recorded over a longer exposure time. While it can brighten the image, it reduces sharpness for objects in motion—making motion blur the best description of its effect. Thus, the correct answer is D.