The SAP system knows the locations of the content server, cache server, and client attached to it. This knowledge enables it to establish an optimal content access path.

The cache is selected as follows:

1. The SAP system establishes the location of the client.
2. The SAP system then establishes the location of the content server.
3. If the client and the content server are at the same location, no caching is necessary and the requested URL can be retrieved directly from the content server. In other words, the content is displayed directly from the content server.
   If the client and content server are not at the same location, the SAP system finds out the identity of the cache server at the client location.
4. If no cache server is available, the URLs are displayed on the client directly from the content server.
   If one or more cache servers are available, one of these is selected to display the content.