If a systems administrator receives an alert for potential unauthorized access to sensitive data while on a server, what is the MOST appropriate measure to implement?

Implementing permission restrictions is the most appropriate measure to address potential unauthorized access to sensitive data. By restricting permissions, the administrator can ensure that only authorized personnel have access to sensitive data, which limits the potential for unauthorized access incidents. This approach focuses on the principle of least privilege, whereby users are granted the minimum level of access necessary to perform their job functions.

In the scenario of an alert signaling potential unauthorized access, adjusting permissions can immediately mitigate risk by closing off access pathways that could be exploited. It’s a proactive measure that can prevent further access attempts or breaches.

Audit logging is valuable for tracking and analyzing access events, but it does not directly stop unauthorized access. While it can provide insights into who accessed what and when, it doesn't take action against rogue access attempts.

Encryption is an essential security measure for protecting data at rest and in transit, ensuring that even if unauthorized access occurs, the data remains unreadable without the corresponding decryption keys. However, it does not prevent unauthorized access by itself.

User training aims to educate personnel on security policies and best practices to prevent incidents caused by human error. While important, relying solely on training does not provide immediate control over unauthorized access events.

Thus, in this context, adjusting permission restrictions directly addresses the