CCTV Video Storage & Retrieval Systems 1

Question 1

What does DVR stand for in CCTV storage systems?

Accepted Answer

Digital Video Recorder

Answer

DVR stands for Digital Video Recorder, the device that captures and stores analog camera footage in digital format.

Question 2

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

Accepted Answer

Hard disk drives or SSDs

Answer

Modern NVR systems use hard disk drives (HDDs) or solid-state drives (SSDs) due to their high capacity, reliability, and random-access capability.

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 process and encode analog video signals locally, while NVRs record pre-encoded digital streams from IP cameras over a network.

Question 4

Video retention policy refers to:

Accepted Answer

The length of time recorded footage must be kept before overwriting

Answer

A video retention policy defines the minimum and maximum duration that recorded footage must be preserved before it can be overwritten or deleted.

Question 5

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

Accepted Answer

H.264 (AVC)

Answer

H.264 (AVC) is the industry-standard codec for CCTV because it provides high-quality video at significantly reduced file sizes compared to older formats.

CCTV - Certified CCTV Operator Practice Test

CCTV - Certified CCTV Operator Practice Test

CCTV Video Storage & Retrieval Systems 1