试题与答案

用于灾难恢复的通信网络包括生产中心和灾难备份中心间的备份网络和最终用户访问灾难备份中

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题型：单项选择题

题目：

用于灾难恢复的通信网络包括生产中心和灾难备份中心间的备份网络和最终用户访问灾难备份中心的网络，通信线路应至少有（）种以上不同的物理线路

A.一

B.二

C.三

D.四

答案：

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