The Trace Network service exposes analytic capabilities (tracing) and validation of network topology, as well as management of trace configurations. The Trace Network service is conceptually similar to the Utility Network and Network Analysis services for utility and transportation networks, respectively.
License:The active portal account must be licensed with the ArcGIS Trace Network user type extension to use the Trace Network and Network Diagram services.
JSON Response syntax
Trace network is Trace Network version 2.
"name": "Trace Network Server",
"type": "Map Server Extension",