20+ practice questions focused on MPLS and Segment Routing — one of the most tested topics on the Cisco SPCOR / CCNP Service Provider Core 350-501 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start MPLS and Segment Routing PracticeAn engineer is configuring MPLS LDP on a Cisco router. The router uses downstream unsolicited mode with liberal label retention. Which behavior describes the label distribution and retention on this router?
Explanation: Downstream unsolicited means the downstream router sends label bindings to all neighbors without being asked. Liberal label retention means the router keeps all received label bindings, even if the next hop is not reachable.
In MPLS, which operation is performed when a packet arrives at a transit router and the top label matches the router's own label assigned for the FEC?
Explanation: When the top label is the router's own label (often an implicit null or explicit null), the router pops the label and forwards the packet based on the next label or IP header.
An engineer is deploying MPLS-TE with FRR using the 1:1 detour method. Which statement about link protection in this scenario is true?
Explanation: 1:1 detour creates a one-to-one backup LSP for each protected LSP. The detour LSP is pre-signaled and protects against link failure by re-routing traffic around the failed link.
In Segment Routing (SR-MPLS), which IGP TLV is used by IS-IS to advertise the Node SID for a prefix?
Explanation: IS-IS uses the IS-IS Router CAPABILITY TLV (135) with sub-TLV 19 to carry the SR-capable information and prefix-SID. Specifically, the Prefix-SID is advertised in the IS-IS Extended IP Reachability TLV (135) with sub-TLV 3.
Which RSVP message is used to tear down an MPLS-TE LSP by being sent from the ingress toward the egress?
Explanation: RSVP-TE uses PATH messages to establish state and RESV to reserve. To tear down, a PathTear message is sent from the ingress to the egress, or a ResvTear from egress to ingress.
+15 more MPLS and Segment Routing questions available
Practice all MPLS and Segment Routing questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of MPLS and Segment Routing. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
MPLS and Segment Routing questions on the 350-501 frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. MPLS and Segment Routing is tested as part of the Cisco SPCOR / CCNP Service Provider Core 350-501 blueprint. Practicing with targeted MPLS and Segment Routing questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but MPLS and Segment Routing is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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