In an MPLS network, data is forwarded based on information such as FIB, NHLFE, and ILM. Which of the following options is mainly used for information association?

In an MPLS network, data is forwarded based on information such as FIB, NHLFE, and ILM. Which of the following options is mainly used for information association?
A . Label output
B . Tunnel ID
C . Tag operation type
D . FEC

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Answer: B