Which of the following statements regarding the forwarding mechanism are correct?

MPLS implements data forwarding based on two different planes.

Which of the following statements regarding the forwarding mechanism are correct? (Multiple Choice)
A . After an IP packet enters an MPLS domain, the device receiving the packet queries in the FIB table first.
B . The system automatically assigns an ID to the upper-layer application that uses a tunnel. This ID is also called the tunnel I
D . If the tunnel ID is 0x0, the MPLS forwarding process starts.
E . If the tunnel ID is not 0x0, the normal IP forwarding process starts.

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Answer: AB