Question 375 of 505

Cisco Platforms and Development →mediumMultiple ChoiceObjective-mapped

200-901 Cisco Platforms and Development Practice Question

This 200-901 practice question tests your understanding of cisco platforms and development. 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.

Exhibit

Refer to the exhibit.
{
  "templateId": "template-123",
  "templateName": "Branch-VPN",
  "deviceType": "vedge-C8000V",
  "configType": "template",
  "features": [
    {
      "feature": "cisco-vpn",
      "definition": {
        "vpn-id": 10,
        "name": "Data-VPN",
        "ip": {
          "route": [
            {"prefix": "0.0.0.0/0", "nextHop": "10.0.0.1", "vpn": 0}
          ]
        }
      }
    }
  ]
}

Based on the exhibit, what is the purpose of the 'vpn' field in the route object?

Question 1mediummultiple choice

Read the full VPN explanation →

Exhibit

Refer to the exhibit.
{
  "templateId": "template-123",
  "templateName": "Branch-VPN",
  "deviceType": "vedge-C8000V",
  "configType": "template",
  "features": [
    {
      "feature": "cisco-vpn",
      "definition": {
        "vpn-id": 10,
        "name": "Data-VPN",
        "ip": {
          "route": [
            {"prefix": "0.0.0.0/0", "nextHop": "10.0.0.1", "vpn": 0}
          ]
        }
      }
    }
  ]
}

A
It is an optional field that sets the VPN label
Why wrong: The field is not optional for next hop routing.
B
It defines the transport VPN for traffic from this VPN
Why wrong: It does not define transport VPN; it points to the next hop VPN.
C
It specifies the VPN that the route belongs to
Why wrong: The route belongs to VPN 10, defined by the parent.
D
It specifies the VPN ID of the next hop
The next hop is reachable via the specified VPN.

Full breakdown with real-world context →

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

✓

It specifies the VPN ID of the next hop

In Cisco NSO (Network Services Orchestrator) and similar routing contexts, the 'vpn' field in a route object specifies the VPN ID of the next hop, not the route's own VPN. This is critical for inter-VPN routing, where a route in one VPN must point to a next hop that resides in a specific VPN to ensure proper forwarding across VPN boundaries. The correct answer is D because the field identifies the VPN context of the next-hop address, enabling the route to be resolved correctly in multi-VPN environments.

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.

✗
It is an optional field that sets the VPN label
Why it's wrong here
The field is not optional for next hop routing.
✗
It defines the transport VPN for traffic from this VPN
Why it's wrong here
It does not define transport VPN; it points to the next hop VPN.
✗
It specifies the VPN that the route belongs to
Why it's wrong here
The route belongs to VPN 10, defined by the parent.
✓
It specifies the VPN ID of the next hop
Why this is correct
The next hop is reachable via the specified VPN.
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 a route's own VPN context and the VPN of its next hop, and the trap here is that candidates mistakenly think the 'vpn' field identifies the route's own VPN (Option C) rather than the next hop's VPN, because they overlook the fact that the route's VPN is already defined by the containing VRF or service model.

Detailed technical explanation

How to think about this question

Under the hood, the 'vpn' field in a route object is used in Cisco NSO's L3VPN service models to indicate the VPN ID of the next-hop address, which is essential when the next hop resides in a different VRF or VPN than the route itself. This allows the route to be installed in the correct VRF's RIB with a next hop that is reachable via another VRF, enabling inter-VRF route leaking without manual redistribution. In real-world scenarios, this is commonly seen in MPLS L3VPN deployments where a provider edge (PE) router must forward traffic from one customer VPN to a next hop in a different VPN, such as when using extranets or shared services.

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 200-901 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.

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FAQ

Questions learners often ask

What does this 200-901 question test?

Cisco Platforms and Development — This question tests Cisco Platforms and Development — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: It specifies the VPN ID of the next hop — In Cisco NSO (Network Services Orchestrator) and similar routing contexts, the 'vpn' field in a route object specifies the VPN ID of the next hop, not the route's own VPN. This is critical for inter-VPN routing, where a route in one VPN must point to a next hop that resides in a specific VPN to ensure proper forwarding across VPN boundaries. The correct answer is D because the field identifies the VPN context of the next-hop address, enabling the route to be resolved correctly in multi-VPN environments.

What should I do if I get this 200-901 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.

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Last reviewed: Jun 24, 2026

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