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350-501 Automation and Quality of Service Practice Question

Drag and drop the steps to configure MPLS LDP on a Cisco router into the correct order.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps
Order
1Step 1
2Step 2
3Step 3
4Step 4
5Step 5

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

✓

Step 1: Enable CEF (ip cef), Step 2: Configure LDP router-id (mpls ldp router-id), Step 3: Enable MPLS on interfaces (mpls ip)

MPLS LDP requires CEF, enabling MPLS on interfaces, and setting the LDP router-id.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✓

    Step 1: Enable CEF (ip cef), Step 2: Configure LDP router-id (mpls ldp router-id), Step 3: Enable MPLS on interfaces (mpls ip)

    Why this is correct

    This is the correct order because MPLS requires CEF to be enabled first for packet switching. Then, the LDP router-id should be set to a stable loopback address before enabling MPLS on interfaces to ensure LDP sessions use the correct source address.

  • ✗

    Step 1: Enable MPLS on interfaces (mpls ip), Step 2: Enable CEF (ip cef), Step 3: Configure LDP router-id (mpls ldp router-id)

    Why it's wrong here

    This is incorrect because MPLS depends on CEF for forwarding. Enabling MPLS on interfaces before CEF will result in an error or no effect. CEF must be enabled globally first.

  • ✗

    Step 1: Configure LDP router-id (mpls ldp router-id), Step 2: Enable CEF (ip cef), Step 3: Enable MPLS on interfaces (mpls ip)

    Why it's wrong here

    This is incorrect because CEF must be enabled before any MPLS configuration, including the LDP router-id. The router-id setting requires CEF to be active, otherwise it may fail or apply incorrectly.

  • ✗

    Step 1: Enable CEF (ip cef), Step 2: Enable MPLS on interfaces (mpls ip), Step 3: Configure LDP router-id (mpls ldp router-id)

    Why it's wrong here

    This is incorrect because the LDP router-id should be configured before enabling MPLS on interfaces. If MPLS is enabled first, LDP may use a default router-id (e.g., the highest IP on a loopback), which might not be intended, and changing it later could reset LDP sessions.

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This 350-501 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-501 exam.