What are three characteristics of overlay VPNs? (Choose three.)

A.
Service provider infrastructure appears as point-to-point links to the customer routers.

B.
Routing protocols run directly between the customer routers.

C.
Implementing optimum routing between customer sites requires a partial mesh of virtual
circuits.

D.
Service provider PE routers use route filtering to isolate between different customers.

E.
Service provider does not participate in customer routing.