How can organizations assess their security posture according to DSAC Annex B?

Organizations can effectively assess their security posture through regular security assessments and vulnerability scans. This approach allows them to identify potential weaknesses in their systems, applications, and processes. By performing these assessments, organizations can proactively discover vulnerabilities before they can be exploited by malicious actors. Regular scans help maintain an up-to-date understanding of the security landscape since threats are constantly evolving. This continual vigilance enables organizations to implement necessary measures, configurations, and updates to mitigate risks, thereby enhancing their overall security effectiveness.

While other methods, such as employee surveys or establishing a security committee, contribute to a security culture, they do not provide the same rigorous, data-driven insights into vulnerabilities and compliance levels as ongoing assessments and scans. Random audits of employee activity could also yield valuable information but will not give a comprehensive view of technical vulnerabilities within the organization's infrastructure. Therefore, the most effective strategy highlighted in the correct option focuses on systematic and regular evaluation of security measures through assessments and scans.