Question

You are designing a model-driven telemetry (MDT) solution to stream interface counters from IOS-XE routers into a time-series database. Your teammate asks you to explain which architectural component determines WHICH data is collected from the device's YANG data store. Which MDT component defines the specific set of data nodes that the device streams?

Accepted Answer

The sensor path (subscription filter), which references a YANG XPath identifying the exact data nodes to collect

Answer

The transport protocol (gRPC or NETCONF), which negotiates the connection between publisher and collector

Answer

The encoding format (key-value GPB or self-describing GPB), which serializes the streamed payload

Answer

The update policy (periodic or on-change), which controls the cadence at which telemetry is published