CISSP-ISSAP · Question #73
Which of the following are examples of physical controls used to prevent unauthorized access to sensitive materials?
The correct answer is A. Thermal alarm systems B. Security Guards C. Closed circuit cameras. Physical controls are tangible, real-world mechanisms that restrict or monitor access to sensitive areas and materials. Thermal alarm systems (A) detect body heat to alert when unauthorized persons enter restricted zones, security guards (B) physically enforce access policies…
Question
Which of the following are examples of physical controls used to prevent unauthorized access to sensitive materials?
Options
- AThermal alarm systems
- BSecurity Guards
- CClosed circuit cameras
- DEncryption
How the community answered
(38 responses)- A87% (33)
- D13% (5)
Explanation
Physical controls are tangible, real-world mechanisms that restrict or monitor access to sensitive areas and materials. Thermal alarm systems (A) detect body heat to alert when unauthorized persons enter restricted zones, security guards (B) physically enforce access policies and can intervene in real time, and closed circuit cameras (C) visually monitor and record activity - all three operate in the physical world to deter or detect unauthorized access.
Why D is wrong: Encryption is a logical (or technical) control - it protects data in transit or at rest through software/mathematical means, not through any physical barrier or presence.
Memory tip: Think "can you touch it or be stopped by it in person?" If yes, it's likely a physical control. Guards can block you, alarms can sound, and cameras can record you - but encryption lives entirely in the digital realm.
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