试题与答案

若服务器系统年停机时间为55分钟,那么系统可用性至少达到()。 可用性分类 可用水平

题型:单项选择题

题目:

若服务器系统年停机时间为55分钟,那么系统可用性至少达到()。

可用性分类 可用水平

每年停机时间

容错可用性 99.9999 <1min
极高可用性 99.999 5min
具有故障自动恢复能力的可用性 99.99 53min
高可用性 99.9 8.8h
商品可用性 99 43.8h

A.99%

B.99.9%

C.99.99%

D.99.999%

答案:

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参考答案:错解析: 储蓄类国债始于2006年7月1日,是我国国债的最新品种。

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