What does a security audit involve?

A security audit involves a systematic evaluation of information systems, which entails a comprehensive review of the security measures, policies, controls, and procedures that are in place to protect an organization's data and systems. This methodical approach ensures that all aspects of security are thoroughly assessed, including vulnerabilities, compliance with regulatory standards, and the effectiveness of existing security controls. By performing this evaluation, organizations can identify gaps in their security posture and areas that need improvement, ultimately strengthening their defenses against potential threats.

The other options do not adequately capture the essence of a security audit. A casual review of security settings lacks the depth and rigor required to effectively assess security posture. Simply deleting outdated security policies does not contribute to a holistic understanding of security practices and may inadvertently create further vulnerabilities. Lastly, using a method to increase internet speed is unrelated to the concept of security audits, as it does not address the assessment or improvement of an organization's security measures.