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On request forwarding for dynamic Web caching hierarchies

We propose a Web caching scheme, based on the caching neighborhood protocol, featuring dynamic caching hierarchies as its underlying infrastructure. Dynamic Web caching hierarchies consist of proxy servers building hierarchies on a per request basis, in contrast to static Web caching hierarchies that comprise proxy servers preconfigured into hierarchies. Concerns of overheads and efficiency in forwarding requests individually have driven conventional Web caching schemes to use static Web caching hierarchies. Nevertheless, we show that a Web caching scheme featuring dynamic caching hierarchies can be both efficient and effective in request forwarding.