Physical Security--Security + Lesson 1.2

Security + Flashcards

What is the main role of physical security in IT and facility protection?

To regulate and restrict access, safeguard assets, deter unauthorized entry, and complement digital security.

What do barricades and bollards protect against?

They physically restrict vehicle access, allow controlled pedestrian entry, and signal high-security zones.

How do access control vestibules prevent tailgating?

They use interlocking doors and authentication (card or biometric readers) so only one person can enter at a time.

What’s the difference between transparent and opaque fences?

Transparent fences improve visibility and monitoring, while opaque fences provide privacy for sensitive operations.

How have modern surveillance cameras advanced beyond recording?

They use AI for motion detection, facial recognition, and license plate reading, enabling real-time alerts.

Why are security guards still important with advanced tech?

They interpret complex situations, validate identities, enforce policies, and deter threats through human presence.

Why is lighting critical in physical security?

It deters intruders, removes hiding spots, improves visibility for guards, and optimizes camera performance.

How do infrared sensors detect motion?

By sensing thermal energy in smaller, confined spaces.

How do microwave sensors work?

They detect movement through radio waves, covering larger areas.

What is the function of ultrasonic sensors?

They use sound wave reflections to detect motion and prevent collisions, often in areas like parking lots.

Why is a layered security approach important?

Combining barriers, surveillance, lighting, guards, and sensors strengthens defenses and reduces vulnerabilities.

Why are security guards often deployed in pairs?

To provide checks and balances, reduce insider threats, and ensure policy enforcement integrity.