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350-401 Practice Question: Drag and drop the steps of MPLS LDP label…
Drag and drop the steps of MPLS LDP label distribution and FIB population into the correct order, from first to last.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Converge IGP (e.g., OSPF or IS-IS)
First, IP routing must be operational so that the IGP converges. Then LDP is enabled on interfaces and forms neighbor relationships. LDP then assigns local labels to FECs and advertises them to neighbors. The remote label is received and installed in the LIB. Finally, the LFIB is populated with the best label bindings for forwarding.
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Last reviewed: Jun 18, 2026
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