When using IP over ATM, which three statements are true? (Choose three)

A.
Layer 3 PVCs must be established to provide routing paths.

B.
A Layer 2 hub and spoke topology is usually used because it is easier to manager.

C.
Layer 2 devices have no knowledge of Layer 3 routing information.
Virtual circuits must be established.

D.
Layer 2 topology may be different than the Layer 3 topology, resulting in suboptimal paths and
link
utilization.