HTTP /1.1 has a feature known as persistent connections that is supported by the Apache Web server. You use the KeepAlive directive to specify whether persistent connections should be allowed or not. This is a simple directive that can have a value of on or off. If you want Apache to use persistent connections, you need to specify the value on for this directive.

Note Persistent connections is a feature of the HTTP /1.1 protocol that is used by all HTTP /1.1-compliant browsers to send requests to the Web server. This highly useful feature enables the browser to send multiple requests over a single connection, which greatly increases the download speed. Imagine that you want to download a Web page that has several graphics, audio, and video files. With only a single connection from the client, you can request each of the inline documents separately.

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