Given the following MPLS L2 configuration command: mpls-relay 10.1.1.1 4 Which two statements
true? (Choose two.)

A.
This command is applied to the core router facing interface.

B.
This command is applied to the customer facing interface.

C.
The 4 is locally significant and identifies the layer 2 circuit.

D.
The 4 must match exactly on the peer router configuration on the remote end.