During an audit, inspectors discovered that maintenance personnel without the required security clearance were routinely allowed into a secure data center. Which security control should be strengthened to prevent this unauthorized entry?
Firewalls
Security awareness training
Intrusion detection systems
Access controls
Access controls restrict entry to resources-whether a room, system, or dataset-to authorized subjects only. Because the breach involved unvetted staff walking into a sensitive area, the root cause is weak or missing door or identity-verification mechanisms. Strengthening access controls (for example, badge readers, biometric locks, or enforced approval lists) would ensure that only individuals with proper clearance may enter. Firewalls and intrusion detection systems protect logical network traffic, and security awareness training targets user behavior; none of those directly block physical entry to the data center.
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