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。
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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