To publish and serve cached image services, the ArcGIS Server must be licensed as an Image Server. This licensing role is designed specifically for serving raster datasets, image services, and cache-based imagery workflows.
From ArcGIS Server documentation:
“The Image Server role is required to publish and manage image services, including those that serve pre-generated tile caches and support raster analytics.”
Option A (GIS Server) supports feature and map services, but not cached imagery.
Option C (Mission Server) is for real-time operations, unrelated to imagery or features.
[Reference:ArcGIS Enterprise – Server Roles and Functionality (Image Server), ]
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