- A
Model-driven telemetry uses YANG data models to define the data to be streamed.
Correct because YANG models describe the structure and semantics of the data, enabling structured telemetry.
- B
Telemetry data can be pushed from the network device to a collector using gRPC or gNMI.
Correct because gRPC and gNMI are common transport protocols for model-driven telemetry, supporting push-based streaming.
- C
Model-driven telemetry supports both periodic and on-change subscriptions.
Correct because subscriptions can be configured to report data at fixed intervals or only when a value changes.
- D
Model-driven telemetry requires SSH for secure data transport.
Why wrong: Incorrect because gRPC uses TLS for encryption, not SSH; SSH is used for CLI access, not telemetry transport.
- E
Model-driven telemetry increases the polling overhead compared to SNMP.
Why wrong: Incorrect because telemetry is push-based, reducing the need for repeated polling and thus lowering overhead.
Quick Answer
The answer is that model-driven telemetry supports both periodic and on-change subscriptions, which are two of the three true statements for this ENCOR 350-401 question. This is correct because model-driven telemetry leverages YANG data models to structure network data and uses protocols like gRPC (which runs over HTTP/2) or gNMI to push that data to collectors, eliminating the need for constant polling. On the ENCOR exam, this topic tests your understanding of how modern telemetry reduces overhead compared to SNMP, and a common trap is assuming that SSH is required for transport—it is not, as gRPC uses HTTP/2. To remember the key features, think of the acronym YGS: YANG for models, gRPC/gNMI for transport, and Subscriptions (periodic or on-change) for delivery.
CCNP NetFlow and Telemetry Practice Question
This 350-401 practice question tests your understanding of netflow and telemetry. 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 three statements about model-driven telemetry are true? (Choose three.)
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
Model-driven telemetry uses YANG data models to define the data to be streamed.
Model-driven telemetry uses YANG data models and can push data via gRPC or gNMI. It supports both periodic and on-change subscriptions. It reduces polling overhead compared to SNMP. It does not require SSH for transport (gRPC uses HTTP/2).
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.
- ✓
Model-driven telemetry uses YANG data models to define the data to be streamed.
Why this is correct
Correct because YANG models describe the structure and semantics of the data, enabling structured telemetry.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Telemetry data can be pushed from the network device to a collector using gRPC or gNMI.
Why this is correct
Correct because gRPC and gNMI are common transport protocols for model-driven telemetry, supporting push-based streaming.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Model-driven telemetry supports both periodic and on-change subscriptions.
Why this is correct
Correct because subscriptions can be configured to report data at fixed intervals or only when a value changes.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Model-driven telemetry requires SSH for secure data transport.
- ✗
Model-driven telemetry increases the polling overhead compared to SNMP.
Why it's wrong here
Incorrect because telemetry is push-based, reducing the need for repeated polling and thus lowering overhead.
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.
- →
NetFlow and Telemetry — study guide chapter
Learn the concepts, then practise the questions
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NetFlow and Telemetry practice questions
Targeted practice on this topic area only
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ENCOR 350-401 study guide
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FAQ
Questions learners often ask
What does this 350-401 question test?
NetFlow and Telemetry — This question tests NetFlow and Telemetry — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Model-driven telemetry uses YANG data models to define the data to be streamed. — Model-driven telemetry uses YANG data models and can push data via gRPC or gNMI. It supports both periodic and on-change subscriptions. It reduces polling overhead compared to SNMP. It does not require SSH for transport (gRPC uses HTTP/2).
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.
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. Which three statements about model-driven telemetry are true? (Choose three.)
hard- A.Model-driven telemetry uses a pull model where the collector requests data from network devices.
- ✓ B.Telemetry subscriptions can be configured to report data on a periodic interval or when a value changes.
- ✓ C.gRPC and gNMI are common transport protocols used for model-driven telemetry.
- D.Model-driven telemetry requires the use of SNMP for data encoding.
- ✓ E.YANG data models define the structure and semantics of telemetry data.
Why B: Model-driven telemetry (MDT) uses YANG data models and supports both periodic and on-change subscriptions. It uses a push model, reducing polling overhead. gRPC and gNMI are common transport protocols. Telemetry data can be encoded in JSON or GPB.
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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