Appendix A: ISA Server Caching Criteria

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Appendix A: ISA Server Caching Criteria

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HTTP Caching ISA Server uses the following criteria when caching HTTP objects:  HTTP Methods. The Request Method must be an HTTP GET. Otherwise, ISA Server bypasses the cache mechanism. An exception is the case of negative caching. If the request is an HTTP PUT or an HTTP DELETE, ISA Server purges obsolete data from the cache.  Dynamic Content. By default, ISA Server does not cache dynamic content, which is defined as URLs that contain a “?.” If you enable caching of dynamic content, ISA Server caches the object only if the response header contains an Always Cache meta-tag. This scenario hardly occurs, and for performance reasons, you should...

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