The volume of web traffic on the Internet is enormous and a large percentage of that traffic is redundant. Multiple clients ask web servers for the same content repeatedly leading to inefficient use of bandwidth. To relieve the origin web server of processing each request, Internet Service Providers (ISPs) can use the cache redirection feature of NetScaler and serve the content from a cache server instead of from the origin server. The NetScaler analyzes incoming requests, sends requests for cacheable data to cache servers, and sends non-cacheable requests and dynamic HTTP requests to origin servers. Cache redirection feature of NetScaler is policy-based, and by default, requests that match a policy are sent to the origin server, and all other requests are sent to a cache server. You can combine content switching with cache redirection to cache selective content and serve content from specific cache servers for specific types of requested content.
For more information, see Cache Redirection.