Intel 1520 manual Variable content, Following table describes the variable configuration options

Variable content

The following table describes the variable configuration options.

Option	Description
Do not cache	Instructs the appliance to refuse to cache objects served in
	response to URL addresses that contain:
	❚ ?
	❚ ;
	❚ cgi
	❚ end in .asp
Enable	Instructs the appliance to cache alternate versions of HTTP
Alternates	documents.
Vary on these	Enables the appliance to serve alternate documents.
HTTP header	Selecting the Enable Alternates option allows you to specify
fields:	values to match for the following fields:
	❚ If the request is for text: The default value is user-
	agent and cookie. Some documents can have
	thousands of alternate cookie versions. If you choose to
	vary on cookies, it is recommended that you limit the
	number of alternates cached. See Storage‚ on page 36.
	❚ If the request is for images: Images are rarely
	personalized.
	❚ If the request is for anything other than text or images
	Using document header information, the appliance can
	compare cached document specifications against
	requested specifications to determine if the correct
	alternate version of the document is in the cache. For
	example, a document header can specify that the
	document targets a specific browser, but any browser can
	request the document from the appliance. If a requested
	document’s fields do not match a cached document’s fields,
	the appliance does not serve the document from its cache,
	but instead retrieves a fresh copy from the origin server.
Cache	Configures the appliance to cache responses to requests
responses to	that contain cookies for:
requests	❚ no content-types
containing
	❚ all content-types
Cookies for:
	❚ only image-content types
	❚ content-types that are not text

38Intel NetStructure Cache Appliance Administrator’s Guide