350-601 Automation Practice Question
Which protocol is recommended for streaming model-driven telemetry from NX-OS to a collector?
⚠ Common exam trap
Cisco often tests the misconception that HTTP or SNMP can handle streaming telemetry, but the trap is that SNMP is pull-based and HTTP lacks the persistent, bidirectional streaming capabilities of gRPC, which is the only option that natively supports the push-based, subscription-driven model required for NX-OS telemetry.
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
✓
gRPC
gRPC (Google Remote Procedure Call) is the recommended protocol for streaming model-driven telemetry from NX-OS to a collector because it provides efficient, bidirectional streaming over HTTP/2, supports structured data encoding (e.g., Protobuf or JSON), and is natively supported in NX-OS for high-frequency, push-based telemetry. Unlike polling-based protocols, gRPC enables the device to continuously stream operational data to the collector with low latency and minimal overhead.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
FTP
Why it's wrong here
FTP is for file transfer, not streaming.
- ✗
SNMP
Why it's wrong here
SNMP is traditional but not model-driven telemetry.
- ✗
HTTP
Why it's wrong here
HTTP is not a streaming protocol.
- ✓
gRPC
Why this is correct
gRPC with protobuf is the recommended transport for MDT.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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