Which three statements correctly describe how labels are used in cell-mode MPLS? (Choose three.)
A.
The ATM header VPI/VCI field is used for forwarding decisions.
B.
The 32-bit MPLS label is preserved in the frame but is not used in the ATM network.
C.
The original MPLS label is present only in the first cell of a packet.
D.
The 32-bit MPLS label is inserted between the ATM header and the ATM AAL5 header.
E.
Labels in cell-mode MPLS are not a scarce resource like in frame-mode MPLS.
F.
The TTL field in the MPLS label is copied into the ATM header TTL field by the ingress edge LSR.