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        <title> ICMP - 标签 - 五岁博客</title>
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        <description> ICMP - 标签 - 五岁博客</description>
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    <title>执行 ping 命令时,网络到底发生了什么？</title>
    <link>https://fiveyoboy.com/articles/what-happens-when-you-run-ping/</link>
    <pubDate>Mon, 20 Jul 2026 00:00:00 &#43;0000</pubDate>
    <author>五岁博客</author>
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    <description><![CDATA[<p><code>ping example.com</code> 这条命令几乎人人敲过。</p>
<p>回车，几行 <code>time=12.3 ms</code> 滚出来，网络通了。</p>
<p>可中间这十几毫秒里，数据包到底走了哪些路、握了哪些手？</p>
<p>很多教程一句话带过：ping 用 ICMP 发个包，对面回个包，完事。</p>]]></description>
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