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.