Microsoft Azure Architect Technologies (AZ-300) Practice Exam

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In the context of security posture, what does availability ensure?

Protection of user passwords
Access control to authorized users
Data encryption for sensitive information
Prevention of unauthorized information changes

The correct answer is: Access control to authorized users

In the context of security posture, availability ensures that authorized users have access to the information and resources they need when they need them. It is a critical component of the CIA triad (Confidentiality, Integrity, and Availability), which is fundamental to understanding security in computing environments. Availability focuses on ensuring that systems and data are operational and accessible. This means implementing measures to prevent downtime due to failures, attacks, or other issues, thus allowing users who are permitted to access resources to do so without interruptions. This involves strategies such as redundant systems, load balancing, and disaster recovery solutions to maintain a high level of service and quick recovery from outages. While aspects like protection of user passwords, data encryption, and prevention of unauthorized changes are very important components of a security strategy, they are more closely related to confidentiality and integrity. Therefore, the aspect of access control for authorized users aligns most directly with the concept of availability, highlighting the importance of ensuring that users can access the resources they need without undue barriers.