- A
End.DT2U
Why wrong: Used for L2VPN.
- B
End
Why wrong: End is a simple SID that forwards to the next hop.
- C
End.X
Why wrong: End.X forwards to a specific adjacency.
- D
End.DT4
Correct. End.DT4 decapsulates and does IPv4 VRF lookup.
Question 266 of 1,000
350-501 MPLS and Segment Routing Practice Question
This 350-501 practice question tests your understanding of mpls and segment routing. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which SRv6 endpoint behavior is used for L3VPN decapsulation and IP forwarding to the destination in a VRF?
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
✓
End.DT4
End.DT4 is the correct SRv6 endpoint behavior for L3VPN decapsulation and IP forwarding to the destination in a VRF. It removes the outer IPv6 header and SRH, then performs a lookup in the specified VRF IPv4 routing table to forward the inner IPv4 packet. This behavior is defined in RFC 8986 and is the direct SRv6 equivalent of the MPLS-based per-VRF label allocation for L3VPN.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
End.DT2U
Why it's wrong here
Used for L2VPN.
- ✗
End
Why it's wrong here
End is a simple SID that forwards to the next hop.
- ✗
End.X
Why it's wrong here
End.X forwards to a specific adjacency.
- ✓
End.DT4
Why this is correct
Correct. End.DT4 decapsulates and does IPv4 VRF lookup.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between endpoint behaviors by using similar acronyms (e.g., End.DT2U vs End.DT4) to confuse candidates who may not recall that '2U' refers to Layer 2 unicast and '4' refers to IPv4 VRF forwarding.
Detailed technical explanation
How to think about this question
Under the hood, End.DT4 uses a SID (Segment ID) that is bound to a specific VRF; when the SID is the last segment in the SRH, the node removes the outer IPv6 header and performs an IPv4 FIB lookup in the VRF identified by the SID's local context. In real-world deployments, this allows seamless interworking with existing MPLS L3VPN services by mapping per-VRF SIDs to VRF tables, enabling traffic engineering and network slicing without MPLS labels.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 350-501 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
MPLS and Segment Routing — study guide chapter
Learn the concepts, then practise the questions
- →
MPLS and Segment Routing practice questions
Targeted practice on this topic area only
- →
All 350-501 questions
1,000 questions across all exam domains
- →
Cisco SPCOR / CCNP Service Provider Core 350-501 study guide
Full concept coverage aligned to exam objectives
- →
350-501 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related 350-501 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
MPLS and Segment Routing practice questions
Practise 350-501 questions linked to MPLS and Segment Routing.
Automation and Quality of Services practice questions
Practise 350-501 questions linked to Automation and Quality of Services.
Architecture practice questions
Practise 350-501 questions linked to Architecture.
Networking practice questions
Practise 350-501 questions linked to Networking.
Security and Services practice questions
Practise 350-501 questions linked to Security and Services.
Automation and Quality of Service practice questions
Practise 350-501 questions linked to Automation and Quality of Service.
Services practice questions
Practise 350-501 questions linked to Services.
Automation and Assurance practice questions
Practise 350-501 questions linked to Automation and Assurance.
350-501 fundamentals practice questions
Practise 350-501 questions linked to 350-501 fundamentals.
350-501 scenario practice questions
Practise 350-501 questions linked to 350-501 scenario.
350-501 troubleshooting practice questions
Practise 350-501 questions linked to 350-501 troubleshooting.
Practice this exam
Start a free 350-501 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this 350-501 question test?
MPLS and Segment Routing — This question tests MPLS and Segment Routing — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: End.DT4 — End.DT4 is the correct SRv6 endpoint behavior for L3VPN decapsulation and IP forwarding to the destination in a VRF. It removes the outer IPv6 header and SRH, then performs a lookup in the specified VRF IPv4 routing table to forward the inner IPv4 packet. This behavior is defined in RFC 8986 and is the direct SRv6 equivalent of the MPLS-based per-VRF label allocation for L3VPN.
What should I do if I get this 350-501 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jul 4, 2026
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.