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Not every P2P revolves around "content". The most well-known example would be Skype and SIP.

• tptacek 16y ago
  Content-addressed networking doesn't imply that content is being transmitted in discrete units; it implies (what Tibco would call) subject-based addressing, and the notion of publish/subscribe. It works just fine for unicast, and even in strictly unicast situations, there are plenty of cases (conference calls, for instance) where "subscribe" turns out to be useful.