Question 926 of 2,015

Network Function Virtualization →mediumDrag & DropObjective-mapped

Quick Answer

The answer is that the VNF is configured and activated for service as the final step in the NFVI resource allocation and VNF instantiation order. This sequence is correct because the NFVI administrator must first establish the underlying infrastructure by creating a tenant and allocating compute, storage, and network resources before any virtual network function can be deployed. Once the resources are reserved by the VNFM after the VNF descriptor is uploaded to the NFVO, the VNF can be instantiated using those allocated resources, and only then is it configured and activated to provide the intended service. On the ENCOR 350-401 exam, this drag-and-drop task tests your understanding of the lifecycle management flow, with a common trap being to place activation before instantiation or to confuse the NFVO’s role with the VNFM’s. A helpful memory tip is to think of building a house: you first clear the land (allocate resources), then build the frame (instantiate the VNF), and finally turn on the utilities (configure and activate).

350-401 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 NFVI resource allocation and VNF instantiation 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.

Question 1mediumdrag order

Study the full virtualization explanation →

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

✓

NFVI admin creates tenant and allocates compute/storage/network

The correct order starts with the NFVI administrator creating a tenant and allocating compute, storage, and network resources. Then the VNF descriptor is uploaded to the NFVO, which triggers the VNFM to request resource reservation. After resources are reserved, the VNFM instantiates the VNF using the allocated resources. Finally, the VNF is configured and activated to provide the intended service.

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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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: NFVI admin creates tenant and allocates compute/storage/network — The correct order starts with the NFVI administrator creating a tenant and allocating compute, storage, and network resources. Then the VNF descriptor is uploaded to the NFVO, which triggers the VNFM to request resource reservation. After resources are reserved, the VNFM instantiates the VNF using the allocated resources. Finally, the VNF is configured and activated to provide the intended service.

What should I do if I get this 350-401 question wrong?

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

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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 NFVI resource allocation and VNF instantiation into the correct order, from first to last.

medium

✓ A.NFVO receives VNF instantiation request
✓ B.NFVO requests VIM to allocate resources
✓ C.VIM allocates compute, storage, and network
✓ D.NFVO instructs VNFM to instantiate VNF
✓ E.VNFM instantiates VNF on allocated resources

Why A: The NFVI resource allocation and VNF instantiation process begins with the NFVO receiving a VNF instantiation request, then the NFVO requests the VIM to allocate compute, storage, and network resources. The VIM allocates the resources and provides the resource IDs. The NFVO then instructs the VNFM to instantiate the VNF. Finally, the VNFM instantiates the VNF on the allocated resources.

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