The security goal that keeps systems usable by authorized users when needed is _____.
Answer
availability
Explanation
### Why this is right
Availability means authorized users can access usable systems and information when needed. Denial of service and system failures threaten this goal.
### The concept
The CIA security goals are confidentiality, integrity, and availability. They address restricted access, protection from unauthorized change, and continued access. An incident may affect more than one goal at once.
### Terms
- **Availability**: timely access to usable systems and information for authorized users.
- **Denial of service**: an attempt to make a resource unavailable to its intended users.
### Remember
When the problem is that a service cannot be used, consider availability.
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