Finally, the browser receives the session duration time and sets a timeout to keep the connection alive.

最后，浏览器接收会话持续时间并设置一个超时以保持连接处于活跃状态。

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For example, a Web browser will only keep an HTTP connection with a server alive for a certain, pre-defined time.

例如，一个Web浏览器仅将一个服务器活动的HTTP连接保持预定义的特定时间。

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Tomcat uses NIO (Non-blocking IO) to keep the connection alive without wasting the waiting threads.

Tomcat 使用 NIO（无阻塞 IO）来保持连接活动，无需浪费等待中的线程。

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