Overview of proxy server caching

Caching is a feature in which the proxy server saves local copies of the files that clients request so that it can serve them quickly from the cache when they are requested again by the same or other clients.

Caching Proxy is HTTP 1.1 compliant and generally follows the HTTP 1.1 protocol for caching and determining the freshness of documents.

This chapter discusses some features of the proxy server cache. For those features that can be configured, details about how to set the appropriate values are included in subsequent chapters.