What is physical security in Security+?
D3 · Architecture · CompTIA Security+ SY0-701Physical security encompasses the controls, processes, and countermeasures used to protect facilities, equipment, and personnel from physical threats — theft, vandalism, natural disasters, and unauthorized physical access.
Physical security layers (defense in depth):
🏢 Perimeter: fencing, bollards, security lighting, CCTV
🚪 Entry: badge readers, mantraps/airlocks, security guards
💻 Internal: cable locks, server room access controls, clean desk policy
📹 Monitoring: CCTV, motion sensors, visitor logs
Physical security layers (defense in depth):
🏢 Perimeter: fencing, bollards, security lighting, CCTV
🚪 Entry: badge readers, mantraps/airlocks, security guards
💻 Internal: cable locks, server room access controls, clean desk policy
📹 Monitoring: CCTV, motion sensors, visitor logs
Physical security enables all other security — if an attacker has physical access, most logical controls can be bypassed. Key exam concepts: mantrap (two-door entry system), tailgating/piggybacking (following someone through a secure door), clean desk policy (no sensitive info left out), and Faraday cage (blocks electromagnetic signals).