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Healthcare Information Technology Exam Guide for CompTIA Healthcare IT Technician and HIT Pro Certifications by Brian Gugerty, Kathleen McCormick

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Availability

System availability is the property of the system being accessible and usable upon demand by an authorized entity.2 Simply put, availability is the proportion of time a system is functioning.

The availability of a system is typically measured as a factor of its reliability—as reliability increases, so does availability. No system can guarantee 100-percent reliability; therefore, no system can assure 100-percent availability.

Availability as a Component of Data Security

There are three main components, or goals, of data security (together, these are commonly called “CIA”):

• Confidentiality

• Integrity

• Availability

Information or data security is concerned with the confidentiality, integrity, and availability of data regardless ...

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