Leveraging the Internet for fun and profit . As the name suggests, these surrogates take the place of a typical publisher origin point. Redirectors lie at the heart of CDNs, and can exist anywhere from the ISP back to the publisher. Incoming requests for pages or other Web or Internet objects can be steered not to the Web server itself but to an increasingly sophisticated lookup service which considered any number of factors in deciding which surrogate would deliver content to the requesting consumer.
Aggregators accumulate content from multiple sources.
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