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Ｐｉｎｇ命令是一个专用于ＴＣＰ／ＩＰ协议的网络测试工具。Ｐｉｎｇ的工作原理与回声原理相似。回声是本地发出声音，遇到远方物体后返回而形成。Ｐｉｎｇ命令则利用本地计算机向目的主机发送ＩＣＭＰ（Ｉｎｔｅｒｎｅｔ Ｃｏｎｔｒｏｌ Ｍｅｓｓａｇｅ Ｐｒｏｔｏｃｏｌ，因
The Ping command is a network testing tool that is dedicated to the TCP / IP protocol. Ping works similar to the echo principle. Echo is the local sound, encountered afar objects formed after the return. The Ping command uses the local computer to send ICMP (Internet Control Message Protocol) to the destination host