4) APPN does not need ACKs because it assumes a fully reliable network service.
9) APPN does not perform flow/congestion control at transport layer; relies on network layer's "adaptive pacing".
Version 3, called High Performance Routing (HPR), is a small but powerful extension to APPN [Dorling 1997; Freeman 1995].
APPN does not map nicely onto ISO's modular layering since it does not define an explicit transport protocol per se.
HPR, an extension to APPN, enhances data routing performance by decreasing intermediate router processing.
Case management, home visits, crisis intervention, and consultation are also roles of the APPN in the school setting.
19] APPNs are required to complete at least a master's degree in psychiatric nursing, with most programs being two years in length.
IBM also is licensing APPN network node specifications so that other vendors' products can be integrated with APPN networks.
APPN is vital to IBM because it can handle distributed network functions, such as routing information without help from a host, yet can coexist with hierarchical SNA in the same network backbone.