---
title: 101 Switching Protocols
slug: Web/HTTP/Status/101
translation_of: Web/HTTP/Status/101
---
<div>{{HTTPSidebar}}</div>

<p>HTTP <code><strong>101 Switching Protocols</strong></code> 回應碼表示伺服器正在切換到用戶端在請求標頭{{HTTPHeader("Upgrade")}} 中所要求的通訊協定。</p>

<p>伺服端將在回應中包含 {{HTTPHeader("Upgrade")}} 標頭以表明其所切換的通訊協定。此過程在文章 <a href="/zh-TW/docs/Web/HTTP/Protocol_upgrade_mechanism">Protocol upgrade mechanism</a> 中有更加詳細的描述。</p>

<h2 id="狀態">狀態</h2>

<pre class="syntaxbox">101 Switching Protocols</pre>

<h2 id="範例">範例</h2>

<p>通訊協定切換可能會用於 <a href="/en-US/docs/Web/API/WebSockets_API">WebSockets</a> 中。</p>

<pre>HTTP/1.1 101 Switching Protocols
Upgrade: websocket
Connection: Upgrade</pre>

<h2 id="規範">規範</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Title</th>
  </tr>
  <tr>
   <td>{{RFC("7231", "101 Switching Protocol" , "6.2.2")}}</td>
   <td>Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content</td>
  </tr>
 </tbody>
</table>

<h2 id="參見">參見</h2>

<ul>
 <li><a href="/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism">Protocol upgrade mechanism</a></li>
 <li><a href="/en-US/docs/Web/API/WebSockets_API">WebSockets</a></li>
 <li>{{HTTPHeader("Upgrade")}}</li>
 <li>{{HTTPStatus("426")}} <code>Upgrade Required</code></li>
</ul>