Use the Set Common HTTP Response Headers dialog box to configure headers that enable HTTP keep-alive and specify when to expire Web content.
UI Element List
Enable HTTP keep-alive
Select this option to keep a client/server connection open across multiple requests to the server. An open connection improves performance when a client makes multiple requests for Web page content because the server can more quickly return the content for each request.
Expire Web content
Select this option to configure the expiration of Web content. A Web server returns this header value to a client browser in an HTML file header. The browser compares that value with the current date to determine whether to display a page that is cached on the client computer or to request an updated page from the server.
Then select one of the following options to specify when to expire the content: