The has agreed to use OSI protocols as the basis for interconnecting
conformant physical systems. These agreements are contained in the
Protocol Specification [12]. This specification provides, among other
capabilities, a service for communicating messages from a managing process to
the agent process of a managed object and vice versa.
A OS must operate in one of three modes:
-
Agent: the OS only makes managed objects visible to
other OSs, and does not manage any managed objects in other
OSs.
-
Managing: the OS manages managed objects in other OSs, but does
not make any managed objects visible.
-
Agent/Managing: the OS both makes managed objects visible, and manages
managed objects made visible by other OSs.