APPN (Advanced Peer-to-Peer Networking)
An extension of IBM's Systems Network Architecture (SNA) that provides dynamic;multipath routing among computers in an SNA network. IBM launched APPN as asuccessor to Advanced Program-to-Program Communication (APPC); which requiresmore system configuration. APPN enables computers to dynamically exchangeinformation; making it simpler to configure and maintain SNA networks. See SNA.