mediumMultiple ChoiceObjective-mapped
350-401 Model-driven telemetry Practice Question
A network engineer is deploying model-driven telemetry on a Cisco Nexus 9000 switch to monitor BGP prefix changes. The engineer wants to use YANG data models and prefers a transport protocol that is lightweight and uses UDP. Which transport protocol should the engineer select for the telemetry stream?
⚠ Common exam trap
The trap is that candidates often associate model-driven telemetry with gRPC and ignore the UDP requirement. They may choose gRPC because it is the standard for YANG-based telemetry, but the question explicitly requires a UDP transport.
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
✓
SNMP
The engineer explicitly prefers a lightweight transport protocol using UDP. Among the options, only SNMP uses UDP as its transport. Although SNMP is not a model-driven telemetry protocol (it uses MIBs instead of YANG models), the question's requirement for UDP overrides this. gRPC, NETCONF, and RESTCONF all use TCP, so they do not satisfy the UDP requirement. Therefore, SNMP is the correct answer in this scenario.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
gRPC
Why it's wrong here
gRPC uses HTTP/2 over TCP, not UDP. It is a model-driven telemetry protocol but does not meet the UDP requirement.
- ✗
NETCONF
Why it's wrong here
NETCONF uses SSH (TCP) and is a management protocol, not a telemetry protocol. It does not use UDP.
- ✗
RESTCONF
Why it's wrong here
RESTCONF uses HTTPS (TCP) and is a management protocol. It does not use UDP.
- ✓
SNMP
Why this is correct
SNMP uses UDP as its transport protocol, making it lightweight and meeting the engineer's preference. Although SNMP is not based on YANG models, it is the only option that uses UDP.
Go deeper
Related to this question
Learn chapter
Network Architecture Fundamentals
Key term
NETCONF Protocol
NETCONF is a network management protocol that uses a structured data format to configure, retrieve, and modify network devices in a standard, programmatic way.
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.