What is ISO 20794 ‑ 3 about?
ISO 20794 ‑ 3 is part three of the multi-series standard that specifies the OSI transport layer and network layer by means of services and protocols.
They can be used by different applications.
The transport layer:
Transforms a message into a single packet
Adds protocol control information for diagnostic and node configuration into each packet
Adds packet identifier for diagnostic and node configuration into each packet; and