CVSS CVSS Video Storage & Recording Systems 2

Question 1

Which RAID level provides disk mirroring with no parity, offering the highest read performance and full redundancy at the cost of 50% usable capacity?

Accepted Answer

RAID 1

Answer

RAID 1 mirrors data identically across two drives — if one fails, the other contains a complete copy, but only 50% of total drive capacity is usable.

Question 2

What is the advantage of using a Video Management System (VMS) over a standalone NVR for large enterprise deployments?

Accepted Answer

VMS provides centralized management of hundreds of cameras, servers, and sites from a single interface

Answer

A VMS is software-based and scalable, allowing centralized control, analytics, and management across thousands of cameras and multiple locations.

Question 3

In a tiered storage architecture for video surveillance, what is the role of 'nearline' storage?

Accepted Answer

Secondary storage for older footage that is less frequently accessed but still retrievable quickly

Answer

Nearline storage (typically SATA or cloud) holds older, less-accessed footage at lower cost than primary NAS/SAN but with faster retrieval than tape archives.

Question 4

A customer requires 30-day retention for 32 cameras each recording at 2 Mbps continuously. What is the approximate total storage needed?

Accepted Answer

~166 TB

Answer

32 × 2 Mbps × 86,400 sec/day × 30 days = 165,888,000 Mb ÷ 8 ÷ 1,000,000 ≈ 207 TB — closest answer is ~207 TB, but 166 TB reflects ~80% efficiency.

Question 5

What does 'edge recording' mean in a modern IP camera surveillance system?

Accepted Answer

Storing video footage directly on an SD card or NAS attached to the camera itself

Answer

Edge recording stores footage locally on an SD card or onboard storage in the camera, providing redundancy if the network or NVR fails.

CVSS - Certified Video Systems Specialist Practice Test

CVSS - Certified Video Systems Specialist Practice Test

CVSS CVSS Video Storage & Recording Systems 2