Whether you have services in Google Cloud, on-premises, in other clouds, or all of these, your fundamental application networking challenges remain the same. How do you get traffic to these services? How do these services communicate with each other?

Traffic Director can route traffic from services running in Google Cloud to services running in another public cloud and to services running in an on-premises data center. Services can use Envoy as a sidecar proxy or a proxy-less gRPC service. When you use Traffic Director, you can send requests to destinations outside of Google Cloud. This enables you to use Cloud Interconnect or Cloud VPN to privately route traffic from services inside Google Cloud to services or gateways in other environments. You can also route requests to external services reachable over the public Internet.