What does it do?
The basic concept of SNA involves the creation, maintenance and control of sessions between Network Addressable Units (NAUs). These NAUs are referred to as PUs (physical units such as terminals or communications controllers) and LUs (logical units, which provide interfaces between applications and the protocol services).

How is it used?
SNA was originally used to provide communications between IBM 3270 terminals and their attached mainframe, through a terminal concentrator called a cluster controller (single domain). Later extensions of SNA allowed communication between IBM hosts.
Since this protocol is unique at all levels of the OSI reference model, it is necessary to use gateways to communicate between LANs and SNA networks.

Where do I get more information?
Contact your local CBV Office.