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    <title>Dns on CATNAP</title>
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      <title>DNS 是什麼｜從輸入網址到找到 IP 的完整流程</title>
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      <pubDate>Fri, 08 May 2026 00:00:00 +0000</pubDate>
      
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      <description>DNS 是網路的電話簿，把人類看得懂的域名（google.com）翻譯成機器看得懂的 IP 位址。查詢有四層快取，速度極快。</description>
      
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