Quick Answer
The answer is the Cisco-IOS-XR-qos-ma-cfg YANG module. This is correct because it is the native, platform-specific data model designed explicitly for modeling QoS policy-map configurations on Cisco IOS XR devices, including class-maps, policy-maps, and service-policy attachments. When a service provider uses NETCONF to automate QoS policy deployment on PE routers, this module provides the precise structure needed to define and push those policies, aligning exactly with the task’s requirement. On the Cisco SPCOR 350-501 exam, this question tests your understanding of which YANG module maps to specific IOS XR features, often appearing as a trap where candidates confuse the generic IETF QoS model with the platform-native one. A common memory tip is to remember that “ma-cfg” stands for “modular QoS configuration” on IOS XR, and the module name always includes the platform prefix (Cisco-IOS-XR) followed by the feature and “-cfg” for configuration data.
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 SP wants to automate the deployment of QoS policies on numerous PE routers using NETCONF. Which YANG module is most appropriate for modeling the QoS policy-map configuration?
ietf-interfaces
Why wrong: Interface configuration, not QoS policy.
Cisco-IOS-XR-qos-ma-cfg
This YANG module defines QoS policy-map structures.
Cisco-IOS-XR-ip-tcp-yang
Why wrong: BGP YANG, not QoS.
ietf-netconf-acm
Why wrong: Access control model, not QoS.
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-XR-qos-ma-cfg
Option B is correct because the Cisco-IOS-XR-qos-ma-cfg YANG module is specifically designed to model QoS policy-map configurations on Cisco IOS XR platforms. Since the SP is using NETCONF to automate QoS policies on PE routers running IOS XR, this native module provides the exact data model for defining class-maps, policy-maps, and service policies, aligning with the task's requirement.
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.
ietf-interfaces
Why it's wrong here
Interface configuration, not QoS policy.
Cisco-IOS-XR-qos-ma-cfg
Why this is correct
This YANG module defines QoS policy-map structures.
Related concept
Read the scenario before looking for a memorised answer.
Cisco-IOS-XR-ip-tcp-yang
ietf-netconf-acm
Why it's wrong here
Access control model, not QoS.
Common exam traps
Cisco often tests the distinction between native YANG modules (like Cisco-IOS-XR-qos-ma-cfg) and standard IETF modules (like ietf-interfaces), where candidates mistakenly choose a generic interface module instead of the specific QoS policy-map module.
Detailed technical explanation
The Cisco-IOS-XR-qos-ma-cfg module is part of the IOS XR native YANG models and includes containers for policy-map definitions with hierarchical QoS (HQoS) support, allowing nested class-maps and actions like bandwidth, priority, and shaping. In real-world SP deployments, this module enables NETCONF-based automation to push consistent QoS policies across hundreds of PE routers, reducing manual CLI errors and ensuring compliance with service-level agreements (SLAs).
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
Targeted practice on this topic area only
All 350-501 questions
500 questions across all exam domains
Cisco SPCOR / CCNP Service Provider Core 350-501 study guide
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350-501 practice test guide
How to use practice tests most effectively before exam day
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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-XR-qos-ma-cfg — Option B is correct because the Cisco-IOS-XR-qos-ma-cfg YANG module is specifically designed to model QoS policy-map configurations on Cisco IOS XR platforms. Since the SP is using NETCONF to automate QoS policies on PE routers running IOS XR, this native module provides the exact data model for defining class-maps, policy-maps, and service policies, aligning with the task's requirement.
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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