A server machine represents a machine on which ArcGIS Server software has been installed and licensed. A site is made up one or more of such machines that work together to host GIS services and data and provide administrative capabilities for the site. Each server machine is capable of performing all these tasks and hence a site can be thought of as a distributed peer-to-peer network of such machines.
A server machine communicates with its peers over a range of TCP and UDP ports that can be configured using the edit operation. For a server machine to host GIS services, it needs to be added to a cluster. Starting and stopping the server machine enables and disables, respectively, its ability to host GIS services.
Clusters have been deprecated. The use of clusters for new deployments is strongly discouraged and existing deployments are advised to migrate away from use of clusters as part of ongoing maintenance and upgrades.
The administrative capabilities of the server machine are available through the ArcGIS Server Administrator API that can be accessed over HTTP(S). For a server machine to participate in a site, it must be registered with the site. A machine can participate in only one site at a time. To remove a machine permanently from the site, you can use the unregister operation.
The response format. The default response format is html.
Values: html | json
"platform": "<OS platform>",
"platform": "Windows Server 2008 R2-amd64-6.1",