Chapter 1 Introducing the Content Engine

Hardware Features

Otherwise, the Content Engine simultaneously obtains the requested objects from the web server, stores a copy of the objects (caches them), and forwards the objects on to the user.

You can also configure your Content Engine as a proxy server that acts as a network gateway device, which is optimized to retrieve content on behalf of web clients. Direct proxy routing is known as nontransparent caching because the web clients and media players in the network are configured to explicitly point to the Content Engine that is acting as the proxy server.

Note Unlike transparent caching, nontransparent caching is possible even if your network does not support Cisco IOS software and the WCCP.

In nontransparent caching cases, the Content Engine sends the content to the web client from its local storage if the requested content is already available at that location (cache hit). If the requested content is not already stored in the Content Engine’s local cache (cache miss), the Content Engine retrieves the requested content from the origin server, stores a local copy of the content if the content is cacheable, and sends the requested content to the web client. When the Content Engine receives subsequent requests for the same content, it sends the content from its local storage.

By caching web objects, the Content Engine can speed the completion of user requests when more than one user wants to access the same objects. Caching in this manner also reduces the amount of traffic between your network and the Internet, potentially improving your overall network performance and optimizing your bandwidth usage.

Hardware Features

This section illustrates and describes the front and back panel controls, ports, and LED indicators on the CE-511 and CE-566.

 

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Cisco Systems 511, 566 manual Hardware Features

566, 511 specifications

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