CCTV Video Storage & Retrieval Systems 2

Question 1

What is the purpose of RAID in a CCTV storage system?

Accepted Answer

To provide data redundancy and fault tolerance across multiple drives

Answer

RAID (Redundant Array of Independent Disks) distributes or mirrors data across multiple drives to protect against data loss if a single drive fails.

Question 2

Which RAID level mirrors data across two drives, providing full redundancy with 50% usable capacity?

Accepted Answer

RAID 1

Answer

RAID 1 mirrors identical data on two drives; if one fails, the other contains a complete copy, but only half the total capacity is usable.

Question 3

Before exporting CCTV footage as evidence, the operator should:

Accepted Answer

Create a hash checksum to verify file integrity

Answer

Generating a cryptographic hash (e.g., MD5 or SHA-256) before export establishes a verifiable chain of custody by confirming the footage has not been altered.

Question 4

What term describes the process of searching stored video to find a specific recorded event?

Accepted Answer

Video retrieval

Answer

Video retrieval is the process of locating, accessing, and playing back specific recorded footage from a DVR/NVR based on time, date, camera, or event criteria.

Question 5

Which feature allows a CCTV system to immediately locate recorded footage triggered by a specific alarm or sensor event?

Accepted Answer

Event-based or alarm-triggered recording index

Answer

An event-based recording index tags footage segments tied to alarms or sensor triggers, enabling operators to jump directly to relevant footage without scrubbing through hours of recording.

CCTV - Certified CCTV Operator Practice Test

CCTV - Certified CCTV Operator Practice Test

CCTV Video Storage & Retrieval Systems 2