If no echo reply is received, then one or more of the conditions described above hasn't been met and the ping fails (see Listing 2).
如果没有收到回显回复，就说明不满足上述一个或多个条件，ping失败了(见清单2)。
The output from a successful ping can also be useful in helping to determine network latency, as it reports on the time taken to receive the echo reply.
成功的ping的输出还有助于判断网络延迟，因为它会报告收到回显回复花费的时间。
Attempts to send an Internet Control message Protocol (ICMP) echo message to a remote computer and receive a corresponding ICMP echo reply message from the remote computer.
尝试将网际网路控制讯息通讯协定(ICMP)回应讯息传送给远端电脑，并从远端电脑接收对应的ICMP回应回复讯息。
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