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Route requests to multiple services or multiple service instances using a single endpoint. The pattern is useful when you want to:
- Expose multiple services on a single endpoint and route to the appropriate service based on the request
- Expose multiple instances of the same service on a single endpoint for load balancing or availability purposes
- Expose differing versions of the same service on a single endpoint and route traffic across the different versions
https://learn.microsoft.com/en-us/azure/architecture/patterns/gateway-routing