What type of security measure focuses on preventing unauthorized entry into restricted areas?

Access control is a critical security measure specifically designed to prevent unauthorized entry into restricted areas. It involves a systematic approach that includes physical barriers, locks, access cards, biometric readers, and security protocols to manage who can enter which locations. The primary goal of access control is to ensure that only authorized personnel have access to sensitive or restricted areas, effectively safeguarding assets, information, and personnel.

In a security context, access control can encompass various methods such as key card systems, PIN codes, and biometric identification, all aimed at verifying identity and granting or denying access based on established criteria. This direct approach to managing who enters a facility significantly contributes to overall security efforts.

Other options such as alarm systems and surveillance cameras play supportive roles in security strategies but focus differently. Alarm systems typically respond to unauthorized access rather than preventing it, while surveillance cameras monitor and record activities, providing evidence for later review rather than controlling access in real-time. Cybersecurity addresses digital threats and is distinct from physical access control measures, which are focused on physical spaces.