CCTV Video Storage & Retrieval Systems

Question 1

What does DVR stand for in CCTV storage systems?

Accepted Answer

Digital Video Recorder

Answer

Direct Video Router

Answer

Dynamic Video Relay

Answer

Dual Video Receiver

Question 2

Which storage technology is most commonly used in modern NVR systems?

Accepted Answer

Hard disk drives or SSDs

Answer

VHS tape

Answer

Optical disc arrays

Answer

Magnetic drum memory

Question 3

What is the primary difference between a DVR and an NVR?

Accepted Answer

DVRs process analog signals while NVRs process IP camera streams

Answer

DVRs are larger in physical size

Answer

NVRs can only store 24 hours of footage

Answer

DVRs require fiber optic cabling

Question 4

Video retention policy refers to:

Accepted Answer

The length of time recorded footage must be kept before overwriting

Answer

The resolution at which video is recorded

Answer

The number of cameras a system can support

Answer

The frame rate of the video stream

Question 5

Which video compression codec is most widely used in modern CCTV IP camera systems?

Accepted Answer

H.264 (AVC)

Answer

MPEG-1

Answer

DivX

Answer

RealVideo

Question 6

What happens during a 'continuous loop' recording setting on a DVR/NVR?

Accepted Answer

New footage overwrites the oldest recordings once storage is full

Answer

The system pauses recording when motion stops

Answer

The system records only during scheduled hours

Answer

Recording stops when the drive reaches 80% capacity

Question 7

When calculating required storage capacity, which factor does NOT directly affect the calculation?

Accepted Answer

Color of the camera housing

Answer

Number of cameras

Answer

Video resolution and frame rate

Answer

Compression codec used