Information, Computer and Network Security Terms Glossary and
Dictionary
Availability
Availability of network or system is the the ratio of the total time a system is capable of being used during a given interval to the length of the interval. For example, the switching system of the PSTN is claimed to have a 99.999% (5 9's) availability, which translate into a 4 minutes down time each year.
Related Terms
Availability
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