D. By ensuring data is reliable and accessible.
In Google's cloud security model, availability refers to ensuring that data is consistently accessible when needed. This is a key component of a robust security posture, as it ensures that users and systems can access critical data without interruptions, maintaining business continuity. High availability ensures that services and data are resilient to failures, minimizing the risk of downtime and ensuring reliability.
Why the other options are incorrect:
A. By restricting data access to authorized users: This relates more to confidentiality, which ensures that only authorized users can access sensitive data. While important for security, this does not directly address availability.
B. By ensuring data meets industry standards: This option refers more to compliance or integrity. Meeting industry standards helps with regulatory compliance and ensuring the quality and correctness of data, but it doesn't directly focus on the availability of data.
C. By checking that data is accurate and trustworthy: This pertains to data integrity. Ensuring data is accurate and trustworthy is essential for maintaining its value, but it doesn't directly relate to making the data available for access, which is the focus of availability in security.
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