Quick Answer
The answer is gRPC and gNMI. These two protocols are the correct choices because Nexus 9000 switches use gRPC as the high-performance, HTTP/2-based transport layer for streaming telemetry, while gNMI (gRPC Network Management Interface) defines the standardized model-driven subscription and data retrieval mechanisms that run over that gRPC transport. On the Cisco DCCOR 350-601 exam, this question tests your understanding of model-driven telemetry architecture, specifically that gNMI is not a separate protocol but a service built on gRPC, making both essential for streaming telemetry to a collector. A common trap is selecting NETCONF or RESTCONF, which are push-based but not designed for high-frequency streaming telemetry like gRPC/gNMI. Remember the memory tip: “gRPC carries the stream, gNMI defines the dream” — gRPC is the pipe, gNMI is the subscription language.
This 350-601 practice question tests your understanding of automation. 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.
An engineer needs to collect streaming telemetry from a Nexus 9000 switch. Which two protocols can be used to transmit telemetry data to a collector? (Choose two.)
NETCONF
Why wrong: Used for configuration, not streaming telemetry.
gNMI
gNMI is designed for telemetry and management.
HTTP
Why wrong: HTTP is not a telemetry transport protocol.
SNMP traps
Why wrong: SNMP traps are event-driven, not streaming telemetry.
gRPC
gRPC is a common telemetry transport.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
gNMI
gNMI (gRPC Network Management Interface) and gRPC are both correct because they are the primary protocols used for streaming telemetry on Nexus 9000 switches. gNMI defines a standard model-driven telemetry subscription mechanism over gRPC, while gRPC provides the underlying high-performance transport for streaming telemetry data to collectors.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
NETCONF
Why it's wrong here
Used for configuration, not streaming telemetry.
gNMI
Why this is correct
gNMI is designed for telemetry and management.
Related concept
Read the scenario before looking for a memorised answer.
HTTP
Why it's wrong here
HTTP is not a telemetry transport protocol.
SNMP traps
Why it's wrong here
SNMP traps are event-driven, not streaming telemetry.
gRPC
Why this is correct
gRPC is a common telemetry transport.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Cisco often tests the distinction between configuration protocols (NETCONF) and streaming telemetry protocols (gNMI/gRPC), and candidates mistakenly choose NETCONF because it supports YANG-push notifications, but the question specifically asks for 'streaming telemetry' which requires the persistent, high-frequency channel provided by gRPC/gNMI.
Detailed technical explanation
gRPC leverages HTTP/2 multiplexing and protocol buffers (protobuf) for efficient binary serialization, enabling low-latency, high-throughput telemetry streams. On Nexus 9000, the 'telemetry' feature uses a destination-group with gRPC encoding and a sensor-group to subscribe to YANG-modeled data paths (e.g., 'Cisco-NX-OS-device' model), pushing updates at configurable intervals or on-change events. A real-world scenario is monitoring interface counters every 10 seconds to detect micro-bursts, which SNMP or NETCONF cannot sustain without overwhelming the control plane.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 350-601 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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Automation — This question tests Automation — Read the scenario before looking for a memorised answer..
The correct answer is: gNMI — gNMI (gRPC Network Management Interface) and gRPC are both correct because they are the primary protocols used for streaming telemetry on Nexus 9000 switches. gNMI defines a standard model-driven telemetry subscription mechanism over gRPC, while gRPC provides the underlying high-performance transport for streaming telemetry data to collectors.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This 350-601 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 350-601 exam.
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