CST CST Storage & Retention Management

Question 1

What does DVR stand for in a surveillance system?

Accepted Answer

Digital Video Recorder

Answer

A DVR (Digital Video Recorder) captures and stores video from analog cameras by digitizing the signal internally.

Question 2

What is the primary advantage of an NVR over a DVR for modern surveillance installations?

Accepted Answer

NVRs process video data from IP cameras directly over the network

Answer

An NVR receives already-encoded digital video streams from IP cameras over the network, eliminating the need for analog encoding hardware.

Question 3

Which factor has the GREATEST impact on the storage capacity required for a surveillance system?

Accepted Answer

The resolution, frame rate, and compression codec used

Answer

Higher resolution, higher frame rates, and less efficient codecs all increase the storage space consumed per hour of recorded video.

Question 4

What is the purpose of motion-triggered recording in a surveillance storage strategy?

Accepted Answer

To reduce storage usage by only recording when activity is detected

Answer

Motion-triggered recording conserves storage by only writing video to disk when motion is detected rather than recording continuously.

Question 5

In surveillance storage planning, what does 'retention period' refer to?

Accepted Answer

The length of time recorded footage is kept before being overwritten or deleted

Answer

Retention period defines how long video footage is stored before the system automatically overwrites or purges it.

(CST) Certified Surveillance Technician Practice Test