mediumMultiple Select
350-401 Practice Question: Which three statements about telemetry protocols…
Which three statements about telemetry protocols and data collection are true? (Choose three.)
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
✓
gNMI is a gRPC-based network management protocol that supports telemetry streaming.
gNMI is a gRPC-based protocol for streaming telemetry and managing network devices. Dial-out telemetry pushes data from the device to a collector. Telemetry can provide more granular data than SNMP. SNMP is still widely used for legacy monitoring. gNMI does not require CLI configuration for telemetry.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
gNMI is a gRPC-based network management protocol that supports telemetry streaming.
Why this is correct
gNMI runs over gRPC and provides streaming telemetry, satisfying the stem's requirement for a protocol supporting continuous data collection. Unlike SNMP polling or syslog push, gNMI's subscribe operations deliver model-driven updates on change, which is precisely the telemetry streaming capability the question asks you to identify.
- ✓
In dial-out telemetry, the network device initiates the connection to the collector.
Why this is correct
Dial-out telemetry reverses the traditional model: the network device opens the connection to the collector and pushes data. This satisfies the statement by correctly identifying which side initiates the session, unlike dial-in where the collector connects to the device.
- ✓
Telemetry can provide higher granularity and lower latency compared to SNMP polling.
Why this is correct
Streaming telemetry pushes data continuously from the device, so samples arrive at sub-second intervals rather than waiting for each SNMP poll cycle. This satisfies the stem's granularity and latency comparison, since polling frequency is bounded by the interval and the device's response capacity.
- ✗
SNMP is the only protocol supported for telemetry data collection on Cisco IOS XE devices.
Why it's wrong here
Cisco IOS XE supports gRPC dial-out and dial-in telemetry alongside SNMP, so SNMP is not the sole option. SNMP remains valid for polling counters and traps, making it tempting where legacy monitoring is required, but it cannot stream high-frequency model-driven data.
- ✗
gNMI requires the device to be configured with a CLI-based telemetry profile.
Why it's wrong here
gNMI is a gRPC-based protocol configured through YANG models and capabilities exchange, not a CLI telemetry profile. It is tempting because CLI-based telemetry profiles are the genuine configuration mechanism for MDT, the older push-based streaming telemetry approach on Cisco devices.
Go deeper
Related to this question
Learn chapter
Network Monitoring and Troubleshooting Tools
Key term
REST API for Network Devices
A REST API for network devices is a set of rules that allows software applications to communicate with routers, switches, and firewalls using standard web methods like GET, POST, PUT, and DELETE over HTTP or HTTPS.
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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.