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.
There are three main components, or goals, of data security (together, these are commonly called “CIA”):
Information or data security is concerned with the confidentiality, integrity, and availability of data regardless ...