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Content-centric networking (CCN) is a novel approach to networking that abstracts away the specifics of the connection, and focuses on disseminating the content efficiently. This is in contrast to the connection-oriented approach used in most IP applications, which requires establishing a channel between two nodes with known addresses. CCN excels at the comparatively common task of fetching static documents for multiple end users, which causes significant strain on the network as it is implemented in the one-to-one-connection-oriented TCP. The concept has been discussed for decades, but Palo Alto Research Center (PARC, formerly a subsidiary of Xerox) is actively developing a real-life implementation called CCNx, which is usable on Linux and other UNIX-like systems today.