300-435 Question 108
Single answerA network engineer is tasked with implementing telemetry for a Cisco enterprise network to monitor the performance of devices in real-time. The engineer is considering using either a subscription model or a publication model for collecting telemetry data. Which of the following statements correctly highlights the key difference between these two models?
- A
In the subscription model, the telemetry data is pushed to the collector without having to request it repeatedly.
- B
In the publication model, the collector must actively query the network device to retrieve telemetry data.
- C
The subscription model allows the collector to subscribe to specific data streams, while the publication model sends data to multiple collectors simultaneously without explicit subscriptions.
- D
The publication model ensures data is sent only when explicitly requested by the collector.
Show answer and explanation
Correct answer: C
Explanation
The key distinction between the subscription telemetry model and the publication telemetry model lies in how data is delivered. In the subscription model, the collector explicitly subscribes to specific streams of data, and the device pushes only the subscribed data. In the publication model, telemetry data is broadcast to one or more collectors without requiring explicit subscriptions. This fundamental difference impacts how telemetry is implemented and optimized in a Cisco enterprise network.
- A. Incorrect.
Incorrect: This describes the publication model, not the subscription model. In the subscription model, the collector explicitly subscribes to specific telemetry data streams.
- B. Incorrect.
Incorrect: In the publication model, data is not queried by the collector. Instead, telemetry data is pushed to the collector based on the device's configuration.
- C. Correct.
Correct: The subscription model requires the collector to subscribe to specific data streams of interest. In contrast, the publication model pushes data to multiple collectors or endpoints without the need for explicit subscriptions.
- D. Incorrect.
Incorrect: This statement misrepresents the publication model. Data in the publication model is proactively sent, not dependent on explicit requests.