A datacenter audit finds that a number of personnel are not using access cards when entering a secured area with a coworker. Which of the following security methods could be implemented to help prevent this behavior?

Implementing a mantrap is an effective way to address the issue of personnel not using access cards when entering a secured area. A mantrap consists of two interlocking doors that create a secure space between them. When one door is opened, the other remains locked, preventing unauthorized individuals from following someone who has legitimate access.

This controlled access mechanism ensures that only one person can enter at a time, thereby enforcing the need for verification of credentials before entry is allowed. It acts as a physical barrier that can enhance security by inhibiting tailgating, where individuals try to enter a secured area by closely following someone with valid access. With a mantrap, personnel are compelled to present their access cards individually, ensuring that each person who enters is authorized.

In contrast, while a keypad can provide controlled access, it still may allow multiple individuals to enter simultaneously, especially in a less monitored setting. A smart card, while providing a means of access control, relies on users to actively engage with the system, which does not prevent tailgating unless combined with physical barriers like a mantrap. Security cameras can serve to monitor access and deter inappropriate behavior, but they do not prevent unauthorized entry by themselves. Thus, the implementation of a mantrap not only offers a