Audit logs can be used to warn off:

Audit logs are crucial for monitoring and maintaining the security and integrity of systems. They record events that occur within a system, providing valuable insights into user activities and system performance. Among these records, logon failures are particularly significant because they can indicate unauthorized access attempts or potential security breaches.

When a logon failure is recorded in an audit log, it serves as a warning signal that someone may be trying to access the system without proper credentials. This information is vital for administrators and security personnel, allowing them to identify and respond to potential security threats in real time. By analyzing patterns in logon failures, organizations can implement further security measures, such as account lockouts, additional authentication requirements, or alerts to system administrators.

In contrast, software updates, network traffic, and data encryption do not serve the direct purpose of warning about unauthorized access attempts. Software updates might be logged, but they do not indicate a failure or a security event. Network traffic can provide insights into the overall use of resources but does not specifically highlight logon issues, while data encryption is focused on protecting information rather than monitoring access attempts. Thus, the role of audit logs in capturing logon failures directly aligns with their function as a security tool for identifying potential breaches.