1. True – Consul traffic management is done at Layer 7 of the Open System Interconnection (OSI).
2. True – The service-resolver definition that's used to declare subsets is based on filters that are used on the metadata of the services. In Kubernetes deployments, such metadata is picked up automatically by Kubernetes through its integration to Consul.
3. True – The Mesh gateway mode is akin to the Egress gateway.

4. True – If service-defaults defines a Mesh gateway mode as being local, each call is made to the Mesh gateway to determine the upstream service.
5. True – Traffic routing using a service-router can only be used for path-based routing.
6. True – Service-resolver can be used to provide a service failover from one data center to another.