Question 1mediumdrag order
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Quick Answer
The answer is that the final step in the Cisco NSO service provisioning workflow is verifying the service by checking device state and alarms. This is correct because NSO operates as a closed-loop system: after pushing configurations via NETCONF and updating its service database, it must confirm that the intended service state matches the actual operational state of the devices, catching any configuration drift or alarm conditions. On the ENCOR 350-401 exam, this drag-and-drop question tests your understanding of NSO’s lifecycle, from YANG model definition to verification, and a common trap is confusing the database update step with the final verification step. Remember the mnemonic “Define, Map, Push, Update, Verify” to keep the order straight: the last action is always a health check, not just a database write.
CCNP Network Function Virtualization Practice Question
This 350-401 practice question tests your understanding of network function virtualization. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Drag and drop the steps of Cisco NSO service provisioning workflow into the correct order, from first to last.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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
✓
Operator defines service using YANG model
The Cisco NSO workflow starts with the operator defining a service in YANG model. Then NSO maps the service to device configurations using a service template. Next, NSO pushes the configuration to network devices via NETCONF. After that, NSO updates the service database with the operational state. Finally, NSO verifies the service by checking device state and alarms.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 350-401 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 350-401 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Network Function Virtualization — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this 350-401 question test?
Network Function Virtualization — This question tests Network Function Virtualization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Operator defines service using YANG model — The Cisco NSO workflow starts with the operator defining a service in YANG model. Then NSO maps the service to device configurations using a service template. Next, NSO pushes the configuration to network devices via NETCONF. After that, NSO updates the service database with the operational state. Finally, NSO verifies the service by checking device state and alarms.
What should I do if I get this 350-401 question wrong?
Identify which 350-401 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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 →
Same concept, more angles
1 more ways this is tested on 350-401
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Drag and drop the steps of Cisco NSO service provisioning workflow into the correct order, from first to last.
medium- ✓ A.Operator sends service request to NSO
- ✓ B.NSO processes service model and creates instance
- ✓ C.NSO generates device configurations via templates
- ✓ D.NSO pushes configuration to devices via NETCONF
- ✓ E.NSO verifies service and updates state
Why A: Cisco NSO service provisioning begins with the operator or OSS sending a service request to NSO via NETCONF/RESTCONF. NSO then processes the service model and creates a service instance. NSO uses device templates and YANG models to generate device configurations. NSO pushes the configuration to the network devices using NETCONF. Finally, NSO verifies the service is operational and updates the service state.
Last reviewed: Jun 18, 2026
This 350-401 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 350-401 exam.
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