How can FortiGate ensure the integrity of a secure network?

FortiGate ensures the integrity of a secure network primarily by continuously applying security policies and conducting regular audits. This approach is crucial because it establishes a consistent enforcement of security measures that protect against vulnerabilities and evolving threats. By implementing a set of well-defined security policies, FortiGate can control access, monitor traffic, and mitigate risks in real time.

Regular audits further enhance a network's integrity by reviewing and validating the effectiveness of these security policies and practices. Through audits, administrators can identify any security gaps, assess compliance with regulatory requirements, and adapt strategies based on changes in the threat landscape. This proactive stance is essential to maintaining a robust security posture over time, as it enables organizations to respond promptly to new risks and ensure that existing protections are functioning adequately.

In contrast to the other options, relying solely on network password changes or basic firewall settings does not provide a comprehensive security framework. While limiting traffic to essential applications can be part of a strategy, it is not sufficient on its own without the continuous application of robust security policies and the ability to conduct regular assessments of those policies' effectiveness.