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hoped ; became hoped ; would become had hoped; would become had hoped; would have become
hoped were hoping had hoped have hoped
DIS CURR DIS THIS DISPLAY DIS CONF
hope hoped have hoped had hoped
hoped; became hoped; would become had hoped; would become had hoped; would have become
hoped; became hoped; could become had hoped; would become had hoped; would have become
ISO/IEC17025 ISO/DIS17511 ISO/FDIS15189 ISO/DIS18153 CNACL201-2001
hoped had hoped hoped would hope
ISO/IEC17025 ISO/DIS17511 ISO/FDIS15189 ISO/DIS18153 CNACL201-2001
hoped;became hoped;would become had hoped;would become had hoped;would have become
DIS的选择需要手动设置 DIS由整个广播网络上优先级最高的IS担当 优先级相同时由IP地址最大的担当 当一个DIS不能工作时，备份DIS会接替它进行工作
hoped; haven’t had hoped; haven’t had hoped; didn’t hoped; didn’t
hoped demanded agreed said
在广播网络中，都选举指定路由器DR（DIS） 优先级最大一定都会当选DR（DIS） 优先级为0的都不可能成为DR DR（DIS）失败，都由备份路由器承担DR（DIS）职责
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