Which security requirement includes 50% backup strands and provision for PTZ control?

• A. Short-range video surveillance
• B. Access control with PTZ
• C. Intrusion detection sensors
• D. Long range low lux perimeter/ border video surveillance

Answer: (D)

In perimeter protection, you’re designing for coverage over large outdoor areas where uptime is critical. Long-range, low-light (low lux) cameras are often used to monitor borders or wide perimeters, and they frequently rely on fiber networks to carry both video and camera control data over significant distances. Because the area is exposed and the system is mission-critical, redundancy is built in. Providing 50% backup strands means you lay extra fiber strands equal to half the number of primary strands, so if a primary path is damaged or needs maintenance, there’s an immediate spare path to keep video feeds and control signals flowing.

Adding provision for PTZ control is essential for these cameras because PTZ capability allows operators to pan, tilt, and zoom to track activity across large spans. Having a dedicated or protected control path (and appropriate power, often via PoE or similar means) ensures that PTZ functions remain available even if other parts of the network experience issues. The combination of remote, wide-area monitoring, night-time or low-light operation, and the need for rapid zooming and targeting all point to perimeter surveillance as the scenario that naturally includes both backup fiber and PTZ provisioning.

The other options describe different security roles that don’t inherently require the same redundancy and PTZ planning. Short-range interior video, typical access-control-only setups with PTZ (which are less about wide-area redundancy), and purely intrusion-detection sensors don’t hinge on the dual needs of long-range fiber backup and PTZ control in the same way as perimeter video surveillance.