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350-401 Practice Question: Is planning to deploy model-driven telemetry in a…
A network engineer is planning to deploy model-driven telemetry in a brownfield network with a mix of Cisco IOS-XE and Nexus devices. The engineer wants to use a single collector that supports both gRPC and UDP-based telemetry. The engineer is concerned about the scalability of the solution, as the network has over 5000 devices. Which design consideration is most important to ensure the telemetry solution scales effectively?
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
✓
Deploy a hierarchical collector architecture with load balancers to distribute telemetry streams across multiple collectors
To use a hierarchical collector architecture with load balancers to distribute the telemetry streams. With 5000 devices, a single collector can become overwhelmed, so multiple collectors or a load-balanced cluster is essential. The other options are incorrect because using only periodic subscriptions does not address scalability; using a single YANG model is not practical; and using a single transport protocol is not feasible for a mixed environment.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use only periodic subscriptions with long sample intervals to reduce data volume
Why it's wrong here
While reducing data volume helps, it does not address the fundamental scalability of the collector infrastructure.
- ✓
Deploy a hierarchical collector architecture with load balancers to distribute telemetry streams across multiple collectors
Why this is correct
This design allows horizontal scaling and prevents any single collector from being a bottleneck.
- ✗
Configure all devices to use the same YANG model to simplify the collector configuration
Why it's wrong here
Using the same YANG model is not feasible for different device types and does not address scalability.
- ✗
Use a single transport protocol (gRPC) for all devices to reduce complexity
Why it's wrong here
Nexus devices may use native UDP telemetry, and forcing gRPC may not be supported or optimal; this does not solve scalability.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.