Network Defense Essentials (NDE) Practice Exam 2025 – Your All-in-One Resource to Exam Success!

The principle that ensures data remains accessible and usable when required is availability. In the context of network defense and data security, availability refers to the ability of users to access data and systems when they need to. This is crucial for maintaining business operations and user satisfaction, as downtime can lead to significant consequences for both organizations and individuals.

Availability is supported through various measures, such as redundancy, failover systems, and regular maintenance. For example, implementing backups can ensure that data is restored quickly in case of hardware failure, thereby promoting continuous access.

The other principles contribute to overall data security but do not directly address the aspect of accessibility. Integrity focuses on the accuracy and consistency of data, ensuring it has not been altered in unauthorized ways. Confidentiality involves protecting data from unauthorized access, meaning that it may not always be accessible to everyone. Authentication is the process of verifying users’ identities, ensuring that only authorized individuals can access certain data or systems. While these principles are essential, availability is specifically dedicated to the aspect of access when required.