Which of the following media does not require a repeater for long-distance (dozens of kilometers) video and control signal transmission?
ACoaxial cable
BOptical fiber
CPower cable
DTwisted pair
Which of the following statements are true about the differences between the digital video recorder (DVR) and network video recorder (NVR)? (Choose all that apply.)
AThe number of cameras that can connect to a DVR or NVR varies depending on the DVR or NVR specifications.
BDVRs connect to analog cameras, and NVRs connect to network cameras.
CBoth DVRs and NVRs store video signals.
DBoth DVRs and NVRs need encode video signals for storage.
Which of the following statements are true about the relationship between the lens and the depth of field (DoF)? (Choose all that apply.)
ALong-focus lens has a small DoF.
BLong-focus lens has a large DoF.
CWide-angle lens has a large DoF.
DWide-angle lens has a small DoF.
A larger CMOS size indicates better photosensitive performance.
ATRUE
BFALSE
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HD cameras have at least ( ) resolution.
A2048p
B720p
C1080p
D560p
A longer camera focal length indicates a narrower field of view.
ATRUE
BFALSE
Compared with optical image stabilization, electronic image stabilization has better effect and lower costs.
ATRUE
BFALSE
Which of the following storage methods are commonly used in the video security system? (Choose all that apply.)
ADisk array
BDigital video recorder (DVR)
CCloud storage
DNetwork video recorder (NVR)
Which of the following statements are true about cloud storage? (Choose all that apply.)
AEasy capacity expansion
BEasy management
CCustomized on demand
DHigh costs
Which of the following RAID modes does not support data verification?
ARAID 5
BRAID 3
CRAID 1
DRAID 6
Which of the following statements is true about the target recognition technology?
ATarget recognition does not require image collection devices.
BTarget recognition can be used to identify persons in video images.
CIn most cases, target match is performed by cameras.
DAll of the above.
Which of the following statements are true about video security storage? (Choose all that apply.)
AWhen calculating the number of hard disks required for storage, you need to consider the number of cameras, bit rate, storage duration, storage redundancy, and hard disk RAID.
BWhen video streams are stored in stream forwarding mode, a dedicated server must be configured to forward video streams.
CWhen video streams are stored in direct storage mode, high performance is required for configured services.
DCloud storage eliminates the performance bottlenecks of forwarding and storage servers.
Which of the following function modules are included in the video management system (VMS)?
ANetwork, stream media forwarding, and storage modules
BEncoder, switch, server, and client software
CStream media forwarding, encoding, and video decoding modules
DStream media forwarding, system management, and data storage and analysis modules and client software
The digital video server (DVS) converts analog signals into network signals for transmission.
ATRUE
BFALSE
Which of the following is the target recognition process?
AFeature point locating - Feature extraction - Target detection - Feature match
DTarget detection - Feature point locating - Feature point extraction - Feature match
Which of the following is not a feature of the SAN storage architecture?
ALow costs and easy installation.
BData is transmitted between hosts and storage systems at a high speed.
CHosts and storage devices can be expanded independently.
DHigh storage capacity utilization.
The video security platform provides functions such as video recording, video image control, video-based alarming, and alarm linkage.
ATRUE
BFALSE
If a company needs to perform secondary development on a camera (for example, developing the client software for connecting to the camera), which of the following protocols can be used for development?
ATCP/IP
BProprietary protocol (HWSDK)
CONVIF
DGB/T 28181
Which of the following devices are included in a video security center? (Choose all that apply.)
AVideo wall
BDecoder
CControl keyboard
DMatrix
What are the applications of big data in the video security field? (Choose all that apply.)
AVehicle search by image
BTraffic violation detection
CVehicle search
DVehicle trajectory analysis
What are the impacts of cloud computing on the video security architecture? (Choose all that apply.)
AFrom simple services to complex services
BFrom discrete data to converged data
CFrom data silos to data sharing
DFrom closed platform to open platform
Which of the following protocols can be used to connect cameras to the platform? (Choose all that apply.)
AONVIF
BTCP/IP
CGB/T 28181
DProprietary protocol
The GPON access solution is applicable to areas with a large number of centralized sites, such as buildings and downtown areas.