There are abnormal running present sometimes in computer network, we have to call some commands of network testing to detect and diagnose the failure.

计算机网络有时会出现非正常运行问题，我们必须使用一些网络测试命令来检测和诊断网络故障。

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Failure to respond to a heartbeat message is caused by several events, such as computer failure, network interface failure, network failure, or even periods of unusually high activity.

未能对检测信号消息做出响应是由几个事件导致的，例如计算机失败、网络接口失败、网络失败，甚至是很少见的高活动期间。

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In a tree network, a cable failure in one of the star networks will isolate the workstation that it links to the central computer of that star network, but only that workstation will be isolated.

在一个树网络中，电缆故障的一个明星网络将孤立的工作站，恒星的中央计算机网络的链接，但只有工作站将孤立。

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