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Axis ANVE practice questions

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Question 1Network video surveillance technologies

In an IP video surveillance system, what is the primary function of a network switch that supports Power over Ethernet (PoE)?

  1. It delivers both data connectivity and electrical power to cameras over a single cable. Correct answer.
  2. It compresses video streams to reduce bandwidth consumption on the network.
  3. It converts analog video signals into digital IP streams for recording.
  4. It provides long-term storage for recorded video footage.

Explanation

A PoE switch supplies operating power to devices such as cameras while simultaneously carrying their network traffic over the same Ethernet cable. This removes the need for a separate power supply at each camera location. Video encoding and storage are handled by cameras and recorders, not by the switch's PoE function.

Question 2Network video surveillance technologies

What does the term 'fisheye' describe when referring to a surveillance camera lens?

  1. A lens that produces a very wide field of view with strong barrel distortion. Correct answer.
  2. A motorized zoom lens that maintains focus across its range.
  3. A lens designed only for close-range facial identification.
  4. A lens that captures only infrared wavelengths in darkness.

Explanation

A fisheye lens has an extremely short focal length that yields a very wide field of view, at the cost of pronounced barrel distortion. The resulting image is typically dewarped in software to produce usable panoramic views. It is not a close-range identification lens, a zoom lens, or an infrared-only lens.

Question 3Network video surveillance technologies

Which statement best describes the role of a Video Management System (VMS)?

  1. It manages recording, viewing, and user access across multiple cameras and recorders. Correct answer.
  2. It provides internet connectivity between remote sites.
  3. It physically mounts and powers the cameras on a site.
  4. It encrypts the camera's onboard firmware.

Explanation

A VMS is the software layer that coordinates live viewing, recording, playback, and access control across many cameras and recording devices. It does not handle physical mounting, provide wide-area connectivity, or manage firmware encryption. Those functions belong to hardware, network infrastructure, and device security respectively.

Question 4Network video surveillance technologies

What is the main purpose of H.264 or H.265 compression in network cameras?

  1. To improve the physical durability of the camera housing.
  2. To increase the sensor's light sensitivity in low-light conditions.
  3. To synchronize the camera's clock with a network time server.
  4. To reduce the bandwidth and storage required to transmit and retain video. Correct answer.

Explanation

Video codecs such as H.264 and H.265 exploit spatial and temporal redundancy to shrink the data volume of a video stream. Lower data volume means less network bandwidth and less storage capacity are consumed. Light sensitivity, housing durability, and time synchronization are unrelated to codec function.

Question 5Network video surveillance technologies

In IP networking, what does a subnet mask define for a device such as a camera?

  1. The encryption algorithm used for secure connections.
  2. Which portion of an IP address identifies the network versus the host. Correct answer.
  3. The physical cable length allowed on the link.
  4. The maximum data rate the camera may transmit.

Explanation

A subnet mask separates an IP address into a network portion and a host portion, which determines whether a destination is local or must be reached through a gateway. It has no relationship to throughput limits, encryption, or cable length. Those are governed by other settings and physical standards.

Question 6Network video surveillance technologies

What is the purpose of an IR-cut filter in a day/night surveillance camera?

  1. To compress infrared frames more efficiently than visible-light frames.
  2. To reduce power consumption of the image sensor at night.
  3. To amplify the video signal before it reaches the encoder.
  4. To block infrared light during daytime so colors are rendered accurately. Correct answer.

Explanation

An IR-cut filter blocks infrared wavelengths during daylight so the sensor records accurate color. In low light the filter is typically removed so the sensor can use near-infrared illumination for monochrome night viewing. It does not amplify signals, reduce sensor power, or affect compression.

Question 7Network video surveillance technologies

Which protocol is commonly used to automatically assign IP addresses to cameras on a network?

  1. DHCP Correct answer.
  2. RTSP
  3. NTP
  4. SNMP

Explanation

DHCP is the protocol that dynamically leases IP addresses and related settings to devices joining a network. SNMP is used for monitoring and management, NTP for time synchronization, and RTSP for streaming media control. Each of these serves a different purpose than address assignment.

Question 8Network video surveillance technologies

What does a camera's 'resolution' refer to in network video?

  1. The amount of light the lens can gather at its widest aperture.
  2. The number of frames the camera can record per second.
  3. The number of pixels captured in each frame, such as 1920 by 1080. Correct answer.
  4. The maximum number of users who can view the stream at once.

Explanation

Resolution describes the pixel dimensions of the captured image, for example 1920 by 1080. It determines the level of spatial detail available in the frame. Frame rate, light gathering, and concurrent viewers are separate characteristics.

Question 9Network video surveillance technologies

A camera must reliably identify a person's face at a doorway roughly 6 meters away. Which combination of factors matters most?

  1. The camera housing's ingress protection rating alone.
  2. Sufficient pixel density on target and appropriate focal length for the distance. Correct answer.
  3. Maximum frame rate and the largest available storage drive.
  4. The number of PoE ports on the switch and cable color coding.

Explanation

Identification depends on capturing enough pixels across the target, which is driven by resolution and focal length relative to distance. Frame rate, storage, port count, and housing rating do not determine facial detail. Pixel density on target is the governing criterion for identification tasks.

Question 10Network video surveillance technologies

An operator wants to reduce bandwidth from a scene with little motion. Which approach is most appropriate?

  1. Lower the frame rate and use a more efficient codec profile. Correct answer.
  2. Switch the stream from unicast to broadcast.
  3. Disable the IR-cut filter permanently.
  4. Increase the sensor resolution and raise the frame rate.

Explanation

Reducing frame rate cuts the number of encoded frames per second, and a more efficient codec profile lowers bits per frame. Together they substantially reduce bandwidth for a low-motion scene. Raising resolution or frame rate increases load, broadcasting wastes bandwidth, and disabling the IR-cut filter affects color rendering rather than bandwidth.

Question 11Network video surveillance technologies

Why is NTP important in a multi-camera surveillance deployment?

  1. It balances the video load across multiple recorders.
  2. It assigns unique IP addresses to each camera.
  3. It encrypts video streams between camera and recorder.
  4. It keeps timestamps consistent so recorded events can be correlated accurately. Correct answer.

Explanation

NTP synchronizes device clocks so that recordings and event logs from different cameras share a consistent timeline. Consistent timestamps are essential for investigations and evidence integrity. Address assignment, encryption, and load balancing are handled by other mechanisms.

Question 12Network video surveillance technologies

What is the key difference between constant bitrate (CBR) and variable bitrate (VBR) encoding?

  1. CBR always produces higher image quality than VBR.
  2. VBR requires more storage than CBR in every scenario.
  3. CBR maintains a steady data rate while VBR adjusts it to scene complexity. Correct answer.
  4. VBR cannot be used with H.265 codecs.

Explanation

CBR holds the output data rate roughly constant, while VBR varies the rate with scene activity to spend bits where they are needed. Quality comparisons depend on settings, not on the bitrate mode alone. VBR works with modern codecs, and its storage use varies with activity rather than always exceeding CBR.

Question 13Network video surveillance technologies

A camera and recorder sit on different subnets. What must be configured so the camera can reach the recorder?

  1. A default gateway on the camera pointing to a router that can forward to the recorder's subnet. Correct answer.
  2. A second IP address on the camera in the recorder's subnet.
  3. Broadcast streaming from the camera to all hosts.
  4. A larger subnet mask on the recorder only.

Explanation

Traffic destined for a different subnet must be sent to a gateway that can route it toward the destination network. The camera therefore needs a correct default gateway. Changing only the recorder's mask, adding a second address, or broadcasting do not provide proper routed connectivity.

Question 14Network video surveillance technologies

What advantage does H.265 offer over H.264 for the same perceived image quality?

  1. It typically achieves lower bitrates through more efficient coding tools. Correct answer.
  2. It guarantees perfect color accuracy in all lighting.
  3. It removes the need for a video management system.
  4. It eliminates the need for any network bandwidth.

Explanation

H.265 introduces more advanced coding tools that generally reduce the bitrate needed for comparable quality versus H.264. It does not eliminate bandwidth needs, replace a VMS, or guarantee color accuracy. Those outcomes depend on other system elements.

Question 15Network video surveillance technologies

An operator needs to view live video from a camera over the internet without exposing the camera directly. What is a sound approach?

  1. Use a public IP address with the default password.
  2. Publish the stream through a secured gateway or VMS with authentication and encryption. Correct answer.
  3. Forward the camera's management port directly to the internet.
  4. Disable authentication so clients connect faster.

Explanation

Exposing video safely requires a controlled access layer such as a secured gateway or VMS that enforces authentication and encryption. Directly exposing management ports, disabling authentication, or using default credentials creates serious security risks. The secure intermediary limits exposure while enabling remote viewing.

Question 16Network video surveillance technologies

What does the term 'WDR' (wide dynamic range) address in a camera?

  1. The range of network addresses a camera can reach.
  2. The maximum storage capacity the camera supports.
  3. Scenes containing both very bright and very dark areas in the same frame. Correct answer.
  4. The number of simultaneous users allowed to view the stream.

Explanation

WDR techniques balance exposure so detail is retained in both bright and shadowed regions of a high-contrast scene. This is common at entrances and against backlight. It does not concern addressing, storage capacity, or user limits.

Question 17Network video surveillance technologies

Why might a deployment use multicast rather than unicast for distributing a camera stream to many viewers?

  1. It encrypts the stream automatically without configuration.
  2. It removes the need for any network switch configuration.
  3. A single stream is sent to the network and shared, reducing server and link load. Correct answer.
  4. It guarantees delivery to every client even across the internet.

Explanation

Multicast sends one stream that the network replicates to interested receivers, reducing the load on the source and shared links. It does not guarantee delivery, provide automatic encryption, or work without proper switch and network configuration such as IGMP. Those are common misconceptions.

Question 18Network video surveillance technologies

What is the function of a privacy mask in a surveillance camera?

  1. It blocks infrared light from reaching the sensor.
  2. It hides the camera's IP address from the network.
  3. It encrypts recorded footage on the storage drive.
  4. It permanently obscures selected regions of the image from being viewed or recorded. Correct answer.

Explanation

A privacy mask covers chosen areas of the scene so those regions are not visible in live or recorded video. This supports privacy compliance. It does not hide network addresses, encrypt storage, or act as an optical filter.

Question 19Network video surveillance technologies

A site requires footage to be admissible with verifiable integrity. Which feature best supports detecting tampering with recorded video?

  1. Cryptographic signing or hashing of recorded video. Correct answer.
  2. Enabling a wider field of view.
  3. Using a larger hard drive.
  4. Increasing the camera's frame rate.

Explanation

Cryptographic signing or hashing creates a verifiable fingerprint of recorded video, allowing detection of alteration. Frame rate, drive size, and field of view affect capture and storage, not integrity verification. Integrity assurance requires cryptographic mechanisms.

Question 20Network video surveillance technologies

In a camera's edge storage configuration, what does 'recording on the SD card' primarily provide?

  1. Encryption of the network link.
  2. Higher resolution than the network stream can carry.
  3. Local buffering or backup when the network or recorder is unavailable. Correct answer.
  4. Automatic replacement of the VMS.

Explanation

Edge storage on an SD card lets the camera keep recording locally if the network or recorder fails, and footage can later be retrieved. It does not increase resolution beyond the sensor, replace the VMS, or encrypt the network link. Its main value is resilience and backup.

Question 21Network video surveillance technologies

A camera's image appears grainy in low light. Which adjustment most directly reduces the grain while accepting some motion blur?

  1. Increase the frame rate substantially.
  2. Raise the maximum gain and shorten the exposure time.
  3. Reduce the resolution of the stream.
  4. Lower the maximum gain and lengthen the exposure time. Correct answer.

Explanation

Grain in low light often comes from high sensor gain. Lowering maximum gain reduces noise, and lengthening exposure compensates for the reduced sensitivity at the cost of possible motion blur. Raising gain or frame rate would increase noise or worsen low-light performance, and lowering resolution does not address the noise source.

Question 22Network video surveillance technologies

Two cameras cover the same area at different resolutions. Which metric best compares their ability to resolve fine detail on a distant target?

  1. Frames per second of each stream.
  2. Pixels per meter on the target surface. Correct answer.
  3. Total megapixels of the sensor only.
  4. Bitrate of the encoded stream.

Explanation

Detail on a target depends on how many pixels land on each unit of the target, expressed as pixels per meter. Total megapixels alone ignore distance and field of view, while frame rate and bitrate describe motion and encoding rather than spatial detail. Pixels per meter is the appropriate comparison.

Question 23Network video surveillance technologies

A camera stream works locally but fails when routed across a firewall to a remote site. Which is the most likely cause?

  1. The SD card is full.
  2. Required streaming and control ports are blocked by the firewall. Correct answer.
  3. The camera's lens is out of focus.
  4. The camera's IR-cut filter is engaged.

Explanation

When local viewing works but remote viewing fails, the difference is the network path through the firewall. Blocked streaming or control ports are the most probable cause. Lens focus, SD card capacity, and the IR-cut filter affect image capture locally and would not selectively break routed access.

Question 24Network video surveillance technologies

An integrator must keep retention time constant while doubling the number of cameras. Which combination best achieves this without degrading identification quality?

  1. Disable recording on half the cameras.
  2. Adopt a more efficient codec and tune per-scene bitrate budgets. Correct answer.
  3. Increase resolution on all cameras and keep bitrates fixed.
  4. Raise every camera's frame rate to its maximum.

Explanation

Retention depends on total bitrate across all cameras. A more efficient codec plus scene-appropriate bitrate budgets lowers aggregate bitrate so more cameras fit within the same storage. Raising frame rate or resolution increases data volume, and disabling recording sacrifices coverage. Efficient encoding is the balanced solution.

Question 25Network video surveillance technologies

Why can simply increasing a stream's bitrate fail to improve perceived quality in a low-light, noisy scene?

  1. Encoders ignore bitrate settings in low light.
  2. Higher bitrate always reduces sensor noise.
  3. Bitrate has no relationship to image quality in any scene.
  4. Noise is encoded as detail, so extra bits preserve artifacts rather than real information. Correct answer.

Explanation

In noisy footage the encoder spends bits reproducing random sensor noise, so raising bitrate preserves artifacts instead of true scene detail. Improving light or reducing gain addresses the underlying cause. Bitrate does affect quality generally, does not reduce sensor noise, and encoders do honor bitrate settings.

Question 26Network video surveillance technologies

Which compression standard is designed to provide roughly the same visual quality as H.264 at about half the bitrate?

  1. MPEG-4 Part 2
  2. H.261
  3. H.265 Correct answer.
  4. MJPEG

Explanation

H.265 (HEVC) improves compression efficiency over H.264, typically achieving comparable quality at around 50% of the bitrate. MJPEG and MPEG-4 Part 2 are older and less efficient, while H.261 is a legacy videoconferencing standard.

Question 27Network video surveillance technologies

What is the primary purpose of a PoE injector in a network camera installation?

  1. To assign IP addresses to cameras automatically
  2. To convert optical fiber signals to copper Ethernet
  3. To supply power to a camera over the Ethernet cable when the switch does not provide PoE Correct answer.
  4. To amplify the video signal for long cable runs

Explanation

A PoE injector adds power to the Ethernet connection, allowing a camera to receive both data and power over a single cable when the network switch lacks PoE capability. It does not perform media conversion, signal amplification, or IP address assignment.

Question 28Network video surveillance technologies

Which statement best describes the role of a VMS (video management system) in a surveillance deployment?

  1. It provides a software platform to manage, record, and view video from multiple cameras Correct answer.
  2. It encodes video streams from analog cameras into digital format
  3. It guarantees network security by encrypting all video traffic
  4. It physically mounts and powers the cameras

Explanation

A VMS is software that centralizes the management of cameras, recording, and playback. It does not perform analog-to-digital encoding, physical mounting, or inherently guarantee encryption of all traffic.

Question 29Network video surveillance technologies

What does the term 'fisheye' refer to in the context of surveillance cameras?

  1. A mounting bracket that allows 360-degree panning
  2. A filter that reduces infrared light
  3. A lens that captures a very wide field of view, often 180 degrees or more Correct answer.
  4. A lens that provides extreme telephoto magnification

Explanation

A fisheye lens is an ultra-wide-angle lens that produces a circular or panoramic image, enabling broad coverage with a single camera. It is not a telephoto lens, an IR filter, or a mounting accessory.

Question 30Network video surveillance technologies

In network video, what does 'ONVIF' primarily enable?

  1. Power over Ethernet negotiation
  2. Faster video encoding through hardware acceleration
  3. Interoperability between IP cameras and video management software from different manufacturers Correct answer.
  4. Automatic firmware updates for cameras

Explanation

ONVIF is an open industry forum that develops global standards for interoperability of IP-based security products, allowing devices from different vendors to work together. It does not handle encoding acceleration, firmware updates, or PoE negotiation.

Question 31Network video surveillance technologies

Which cable category is commonly recommended for Gigabit Ethernet connections to IP cameras?

  1. Cat 1
  2. Cat 5e Correct answer.
  3. RG-59
  4. Cat 3

Explanation

Cat 5e (and higher categories like Cat 6) support Gigabit Ethernet speeds up to 100 meters. Cat 3 and Cat 1 are older, lower-speed cables, and RG-59 is a coaxial cable used for analog video.

Question 32Network video surveillance technologies

What is the function of a varifocal lens on a surveillance camera?

  1. It allows the focal length to be adjusted manually to change the field of view Correct answer.
  2. It provides a fixed field of view that cannot be changed
  3. It enables the camera to see in complete darkness without IR illumination
  4. It automatically focuses on moving subjects

Explanation

A varifocal lens permits manual adjustment of the focal length within a range, letting installers set the desired field of view. It does not provide autofocus, fixed field of view, or night vision.

Question 33Network video surveillance technologies

Which protocol is used by a camera to send an alert to a video management system when motion is detected?

  1. SMTP
  2. HTTP event notification Correct answer.
  3. FTP
  4. RTSP

Explanation

Many cameras use HTTP-based event notification (often via ONVIF or proprietary APIs) to push alarms to a VMS. SMTP is for email, FTP for file transfer, and RTSP for streaming.

Question 34Network video surveillance technologies

A camera is installed outdoors facing a busy street. To reduce false motion alarms from passing cars while still detecting people approaching a door, which configuration is most appropriate?

  1. Define a motion detection zone that excludes the street area Correct answer.
  2. Enable constant recording and disable motion detection
  3. Lower the motion sensitivity threshold globally
  4. Increase the camera's resolution to 4K

Explanation

Masking out the street area prevents motion from vehicles from triggering alarms while keeping the door area monitored. Increasing resolution does not reduce false alarms, disabling motion detection defeats the purpose, and lowering sensitivity may miss real events.

Question 35Network video surveillance technologies

An installer needs to connect a camera 150 meters from the network switch using Ethernet. What is the most reliable solution?

  1. Use a fiber-optic link with media converters Correct answer.
  2. Use a higher category Ethernet cable
  3. Increase the camera's bitrate
  4. Use a PoE injector

Explanation

Ethernet over copper is limited to about 100 meters; beyond that, fiber optic cable with media converters extends the distance reliably. Higher cable category does not increase the distance limit, bitrate is unrelated, and a PoE injector does not extend data distance.

Question 36Network video surveillance technologies

A camera supports both H.264 and H.265. The site has limited storage and bandwidth. Which encoding should be selected to maximize retention time while maintaining image quality?

  1. MPEG-4
  2. H.264
  3. MJPEG
  4. H.265 Correct answer.

Explanation

H.265 provides better compression efficiency than H.264, reducing bitrate and storage needs for equivalent quality. MJPEG and MPEG-4 are less efficient and would increase storage requirements.

Question 37Network video surveillance technologies

An operator wants to view recorded video from a specific time range. Which VMS function is used?

  1. Playback with a timeline search Correct answer.
  2. Camera configuration
  3. Live view with digital zoom
  4. Event rule setup

Explanation

Playback with a timeline allows the operator to navigate to recorded footage by date and time. Live view shows real-time video, configuration adjusts settings, and event rules define automated actions.

Question 38Network video surveillance technologies

A camera's IR illumination appears to attract insects at night, causing false motion alerts. Which adjustment is most effective?

  1. Switch from H.265 to H.264 encoding
  2. Enable WDR
  3. Reduce the IR intensity or use an external IR illuminator positioned away from the camera Correct answer.
  4. Increase the camera's sharpness setting

Explanation

Insects are attracted to the camera's built-in IR LEDs; reducing intensity or using an external illuminator reduces attraction. Sharpness, codec choice, and WDR do not address the root cause.

Question 39Network video surveillance technologies

What is the primary benefit of using edge storage (SD card) in a camera?

  1. It improves low-light performance
  2. It provides a local recording buffer if the network or recorder fails Correct answer.
  3. It increases the camera's field of view
  4. It eliminates the need for a PoE switch

Explanation

Edge storage allows the camera to record locally, ensuring footage is captured even when the network or central recorder is unavailable. It does not affect field of view, power delivery, or low-light sensitivity.

Question 40Network video surveillance technologies

A camera stream is configured with a GOP (group of pictures) length of 30 at 30 fps. What does this mean?

  1. The camera sends 30 I-frames per second
  2. The stream has 30 B-frames between each P-frame
  3. The camera records 30 seconds of video per file
  4. An I-frame is sent every second Correct answer.

Explanation

GOP length is the number of frames between I-frames. At 30 fps, a GOP of 30 means one I-frame per second. It does not mean 30 I-frames per second, nor does it define B-frame count or file duration.

Question 41Network video surveillance technologies

Which factor most directly determines the maximum distance at which a camera can identify a person's face?

  1. Network switch port speed
  2. Pixels per meter on the subject Correct answer.
  3. Camera housing material
  4. Camera frame rate

Explanation

Identification distance depends on the number of pixels covering the subject, which is a function of resolution and lens field of view. Frame rate, housing, and network speed do not directly affect pixel density on the subject.

Question 42Network video surveillance technologies

A camera is mounted near a ceiling and produces a washed-out image because the ceiling is brightly lit while the floor is dark. Which feature is designed to handle this?

  1. WDR Correct answer.
  2. PoE
  3. IR-cut filter
  4. ONVIF

Explanation

Wide dynamic range (WDR) balances exposure in scenes with both bright and dark areas. IR-cut filters, PoE, and ONVIF do not address exposure imbalance.

Question 43Network video surveillance technologies

An operator notices that recorded video is smooth but live view stutters. Which is the most likely cause?

  1. The camera's IR-cut filter is malfunctioning
  2. The camera's SD card is full
  3. The NTP server is unreachable
  4. Insufficient network bandwidth or processing power for live decoding Correct answer.

Explanation

Stuttering live view often results from bandwidth or decoding limitations, while recording may be unaffected because it uses a different path. SD card fullness, NTP issues, and IR-cut filter problems do not typically cause live view stutter.

Question 44Network video surveillance technologies

Which statement about privacy masking is correct?

  1. Privacy masks are applied to the video stream and may also affect recording Correct answer.
  2. Privacy masks physically block the lens
  3. Privacy masks only affect live view and never recordings
  4. Privacy masks improve low-light performance

Explanation

Privacy masks are digital overlays that obscure parts of the image and are typically applied to both live and recorded video. They are not physical barriers and do not enhance low-light performance.

Question 45Network video surveillance technologies

A camera is set to 1080p at 30 fps. What does the 'p' in 1080p indicate?

  1. Pixels per inch
  2. Progressive scan Correct answer.
  3. Power over Ethernet
  4. Pal resolution

Explanation

The 'p' stands for progressive scan, meaning each frame is drawn line by line. It does not refer to pixel density, PAL, or PoE.

Question 46Network video surveillance technologies

In a multi-camera deployment, why is it important to synchronize camera clocks?

  1. To ensure recorded timestamps align for accurate incident reconstruction Correct answer.
  2. To enable PoE negotiation
  3. To reduce network bandwidth
  4. To increase the camera's frame rate

Explanation

Synchronized clocks ensure that events from different cameras can be correlated accurately. Clock sync does not affect frame rate, bandwidth, or PoE.

Question 47Network video surveillance technologies

A camera's image appears too dark overall. Which adjustment is most direct?

  1. Increase sharpness
  2. Decrease contrast
  3. Increase exposure time Correct answer.
  4. Enable privacy mask

Explanation

Increasing exposure time allows more light to reach the sensor, brightening the image. Sharpness, contrast, and privacy masks do not directly increase brightness.

Question 48Network video surveillance technologies

Which is a key advantage of a multi-sensor camera compared to multiple single-sensor cameras?

  1. It guarantees better low-light performance
  2. It eliminates the need for a VMS
  3. It covers a wide area with a single camera, reducing cabling and installation points Correct answer.
  4. It provides higher frame rates than any single-sensor camera

Explanation

Multi-sensor cameras combine several imagers in one housing, covering wide areas with fewer network drops and mounts. They do not inherently offer higher frame rates, replace a VMS, or guarantee better low-light performance.

Question 49Network video surveillance technologies

An operator wants to reduce storage consumption while keeping the ability to identify faces at a door. Which strategy is most effective?

  1. Disable recording on the door camera
  2. Use a lower resolution for general overview cameras and a higher resolution for the door camera Correct answer.
  3. Reduce the frame rate of the door camera to 1 fps
  4. Lower the resolution of all cameras equally

Explanation

Tailoring resolution to purpose ensures critical areas like the door retain sufficient detail while overview cameras consume less storage. Lowering all resolutions degrades identification, low frame rates impair face capture, and disabling recording defeats the purpose.

Question 50Network video surveillance technologies

A camera supports H.264 and H.265. The VMS only supports H.264. What is the most practical solution?

  1. Replace the VMS with one that supports H.265
  2. Configure the camera to stream H.264 to the VMS Correct answer.
  3. Upgrade the camera firmware
  4. Use a third-party transcoder

Explanation

The simplest solution is to set the camera's stream to H.264, which the VMS can decode. Replacing the VMS or adding a transcoder may be unnecessary, and firmware upgrade may not add VMS support.