Name all six countermeasures and physical security

• A. Barriers, Light, Locks, Alarms, Fencing, Gates
• B. Barriers, Locks, Alarms
• C. Gates, Locks, Barriers, Alarms
• D. Light, Fencing, Gates, Barriers

Answer: (A)

Physical security relies on a coordinated set of countermeasures that deter, detect, delay, and deny unauthorized access. The complete six are barriers, light, locks, alarms, fencing, and gates. Barriers and fencing provide physical obstacles that block or slow entry. Lighting makes areas visible to deter intrusion and improves monitoring by people and cameras. Locks restrict who can pass through openings. Alarms provide immediate notification of a breach. Gates are controlled access points that regulate entry and exit, often paired with access control. Since the question asks for all six, this list covers every element. Any option that omits one of these items isn’t providing the full suite, such as skipping lighting for reduced visibility, skipping alarms for delayed detection, or missing gates or locks for access control.