SNA physical entities
-
Hosts: example S/370 mainframe
-
Communication Controllers : example FEP 3745 (front-end processor)
-
Establishment Controllers: example 3174 (called cluster controller)
-
Terminals: example 3270
|
SNA network addressable units
-
Logical Units (LUs) - function as end-user port into SNA router
-
Physical Units (PUs)- monitors and control network links (implemented on hosts VTAM)
-
Control Points (CPs) - manage SNA nodes and resources
|
SNA nodes
-
Sub-area Nodes Type 4 and 5 - provide services (Hosts and Communication Controllers)
-
Peripheral Nodes Type 1 and 2 - Establishment Controllers and Terminals
|
