Systems Network Architecture. 1. The part of a user-application network that conforms to the formats and protocols of SNA. It enables reliable transfer of data among end users and provides protocols for controlling the resources of various network configurations. The SNA network consists of network accessible units (NAUs), boundary function, gateway function, and intermediate session routing function components; and the transport network. 2. (IRM) The framework, designed by IBM, which defines the structuring of data communications functions and protocols of the mainframe, including networking protocols, administration software, and hardware devices that provide physical delivery of those protocols.
Systems Network Architecture. A description of the logical structure, formats, protocols, and operation sequences that transmit information and that control the configuration and operation of an IBM network.