Advanced Peer-to-Peer Networking (APPN) is an extension to the
Systems Network Architecture.It includes features such as these:distributed network controldynamic exchange of network topology information to foster ease of connection, reconfiguration, and route selectiondynamic definition of network resourcesautomated resource registration and directory lookup.APPN was meant to complement IBM's Systems Network Architecture, a legacy from the mainframe era. It was designed as a simplification, but it turned out to be utterly complex, in particular in migration situations. APPN was originally meant to be a "DECNET killer", but DEC actually passed away before APPN was completed. Today, of course, APPN has been completely superseded by TCP/IP (Internet). Note that APPN has nothing to do with controversial peer-to-peer file sharing software such as KaZaa or Napster. The designation peer-to-peer in the case of APPN refers to its independence from a central point of control, unthinkable in today's networks but common in the mainframe era.
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ADVANCED PEER-TO-PEER NETWORKING [IBM]. APPN
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