Administering an ISP Installation

Content Expiration Example

Enabling the content expiration feature works well for sites that publish time-sensitive information, such as announcements for events or special offers. By sending clients a custom HTTP header to delete the page from the client’s cache after a certain period of time, you can be sure that the client won’t access a cached version of a page that is out of date. For information about configuring custom headers, see the “Enabling Content Expiration” topic in the IIS 5.0 online product documentation.

Compare the following two examples, in which the client has made a request to a computer named http://bicent/samplecorp:

Without a Custom HTTP Header
With a Custom HTTP Header