hierarchy tree (n)~ A structure in which elements are related to each …
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hierarchy tree (n)~ A structure in which elements are related to each other hierarchically. high availability (n)~ The ability of a system or device to be usable when it is needed. When expressed as a percentage high availability is the actual service time divided by the required service time. Although high availability does not guarantee that a system will have no downtime a network often is considered highly available if it achieves 99.999 percent network uptime.
