一些交换机被设置 为失效关闭（fail close），在失效时会停止数据包的传送，这样就等同于DOS攻击。
基于20个网页-相关网页
... fail address || 故障地址，失效地址 fail close || 出故障关闭 fail closed || 出故障时自动关闭 ...
基于1个网页-相关网页
fail-close 安全
fail-close type 失灵即关式
fail-safe close valve 故障自动关闭阀
Fail to close 即故障关 ; 断路器闭合失败
youdao
It's true most business fail, because the owners close them.
这是真的，很多企业会失败，因为拥有者关闭了他们。
A "run on the bank" usually happens when people believe there is danger a bank may fail or close.
VOA: special.2009.04.26
Blabbermouths often fail to close the deal, win the capital, or get the girl.
FORBES: Do You Talk Too Much? 6 Telltale Signs You're a Blabbermouth
Schools in England will no longer be rated as "outstanding" by inspectors if they fail to close the attainment gap between poor and affluent children.
BBC: Schools told to narrow gap between rich and poor
Higher taxes, however advisable or not, fail to come close to solving the problem.
WSJ: Canada, Druckenmiller and Warsh: Generational Theft Needs to Be Arrested
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