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A key feature of Information-Centric Networking architectures is universal caching where anyone can cache any content and users can obtain the content from anywhere as long as the content itself is intact. This powerful feature benefits the content providers, the Internet Service Providers (ISPs) as well as end users since the requested content can be fetched from the nearest cache that is able to satisfy the request. Hence, server load, redundant network traffic and fetch latency are all reduced. However, given the huge number of contents in the Internet and the rapid replacement of cached contents, designing a scalable routing protocol to reach the full potential of universal caching is very challenging.
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