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+---
+title: 101 Switching Protocol
+slug: Web/HTTP/Status/101
+tags:
+  - HTTP
+  - HTTP 状态码
+translation_of: Web/HTTP/Status/101
+---
+<div>{{HTTPSidebar}}</div>
+
+<p>HTTP  <code><strong>101 Switching Protocol</strong></code>（协议切换）状态码表示服务器应客户端升级协议的请求（{{HTTPHeader("Upgrade")}}请求头）正在切换协议。</p>
+
+<p>服务器会发送一个{{HTTPHeader("Upgrade")}}响应头来表明其正在切换过去的协议。<br>
+ 该过程在协议升级机制(<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism">Protocol upgrade mechanism</a>)中详细描述。</p>
+
+<h2 id="状态">状态</h2>
+
+<pre class="syntaxbox notranslate">101 Switching Protocol</pre>
+
+<h2 id="示例">示例</h2>
+
+<p>在使用 <a href="/en-US/docs/Web/API/WebSockets_API">WebSockets</a> 时会用到协议切换。</p>
+
+<pre class="notranslate">HTTP/1.1 101 Switching Protocols
+Upgrade: websocket
+Connection: Upgrade</pre>
+
+<h2 id="相关协议">相关协议</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="参见">参见</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>