Glossary: CompTIA Security+ SY0-801 Exam Prep
Availability
Keeping systems reachable when needed. As a number it is the share of time a system works: MTBF ÷ (MTBF + MTTR), for example 99.01%.
Where the book teaches it
Related terms
CIA (Confidentiality, Integrity, and Availability)MTBF (Mean Time Between Failures)MTTR (Mean Time to Repair)