Certified Information Systems Security Professional (CISSP) Practice Exam

Which of the following mechanisms specifically helps prevent unauthorized door access?

1. Encryption algorithms

2. Deadbolts

3. Data mining techniques

4. Data execution prevention

The correct answer is: Deadbolts

The use of deadbolts is a foundational physical security mechanism designed specifically to prevent unauthorized access through doors. A deadbolt is a type of lock that cannot be moved to the open position except by rotating the lock cylinder, which is typically operated by a key or a thumb turn. This added layer of security makes it much more difficult for intruders to gain access compared to standard spring bolt locks, which can be easily manipulated. While encryption algorithms, data mining techniques, and data execution prevention are essential in the realm of cybersecurity and data protection, they do not directly address physical access control. Encryption algorithms secure data in transit or at rest, data mining techniques analyze data patterns for insights, and data execution prevention is a security feature that helps prevent malicious code from executing in memory. None of these mechanisms are relevant to controlling physical access to a building or room, which is the primary function of deadbolts.