Quick Answer
The correct YANG module to target for retrieving QoS policy statistics via RESTCONF on Cisco IOS XE is Cisco-IOS-XE-QoS. This native Cisco module is specifically designed to model both QoS policy configuration and operational statistics, including per-policy packet and byte counters, making it the precise data source for RESTCONF queries on IOS XE platforms. On the Cisco SPCOR 350-501 exam, this question tests your understanding of which YANG module maps to which platform feature—a common trap is confusing the open-standard ietf-qos module with the Cisco-native one, but remember that ietf-qos is for multi-vendor interoperability, while Cisco-IOS-XE-QoS is the correct choice for native IOS XE statistics retrieval. A quick memory tip: think “IOS XE = Cisco-IOS-XE-QoS” because the module name literally contains the platform name, reinforcing that it’s the platform-specific answer.
This 350-501 practice question tests your understanding of automation and quality of service. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A network automation engineer needs to retrieve QoS policy statistics from a Cisco IOS XE device using RESTCONF. Which YANG module should be targeted?
Cisco-IOS-XE-QoS
This is the native Cisco YANG module for QoS.
ietf-qos
Why wrong: ietf-qos is a standard model, not Cisco-specific.
Cisco-NX-OS-device
Why wrong: This is for NX-OS, not IOS XE.
openconfig-qos
Why wrong: OpenConfig is a different data model.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Cisco-IOS-XE-QoS
The Cisco-IOS-XE-QoS YANG module is the native Cisco module that provides the data model for QoS policy configuration and operational statistics on IOS XE devices. Since the engineer is using RESTCONF to retrieve QoS statistics from a Cisco IOS XE device, this module is the correct target because it is specifically designed for and supported on IOS XE platforms.
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.
Cisco-IOS-XE-QoS
Why this is correct
This is the native Cisco YANG module for QoS.
Related concept
Read the scenario before looking for a memorised answer.
ietf-qos
Why it's wrong here
ietf-qos is a standard model, not Cisco-specific.
Cisco-NX-OS-device
Why it's wrong here
This is for NX-OS, not IOS XE.
openconfig-qos
Why it's wrong here
OpenConfig is a different data model.
Common exam traps
Cisco often tests the distinction between native Cisco YANG modules (like Cisco-IOS-XE-QoS) and open-standard models (like ietf-qos or openconfig-qos), expecting candidates to know that native modules are required for platform-specific features and statistics on IOS XE devices.
Detailed technical explanation
Under the hood, RESTCONF uses HTTP methods (GET, POST, PUT, DELETE) to access YANG-defined data. When targeting Cisco-IOS-XE-QoS, the engineer would use a GET request to retrieve operational state data such as policy-map statistics, class-map counters, and queue depths. In a real-world scenario, this allows for programmatic monitoring of QoS performance without CLI parsing, enabling integration with tools like Ansible or Python scripts for automated network assurance.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Automation and Quality of Service — study guide chapter
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Automation and Quality of Service practice questions
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All 350-501 questions
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Cisco SPCOR / CCNP Service Provider Core 350-501 study guide
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350-501 practice test guide
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FAQ
Automation and Quality of Service — This question tests Automation and Quality of Service — Read the scenario before looking for a memorised answer..
The correct answer is: Cisco-IOS-XE-QoS — The Cisco-IOS-XE-QoS YANG module is the native Cisco module that provides the data model for QoS policy configuration and operational statistics on IOS XE devices. Since the engineer is using RESTCONF to retrieve QoS statistics from a Cisco IOS XE device, this module is the correct target because it is specifically designed for and supported on IOS XE platforms.
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 25, 2026
This 350-501 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 350-501 exam.
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