Question 1hardmulti select
Full question →hardmulti selectObjective-mapped
A controller exposes a YANG-modeled interface configuration through an API. Which two statements correctly describe the purpose of YANG in that workflow?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
It provides a structured data model for configuration and operational data
YANG defines how data is organized and described.
B
Best answer
It helps standardize how network elements represent managed data
That is one of the main reasons YANG is used in modern programmability frameworks.
C
Distractor review
It replaces IP addressing on routed interfaces
YANG models data; it does not replace network-layer addressing.
D
Distractor review
It is a spanning-tree optimization mechanism
YANG has nothing to do with Layer 2 loop prevention.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking YANG for a network protocol or function rather than a data modeling language. For example, options suggesting YANG replaces IP addressing or optimizes spanning-tree protocols are incorrect because YANG does not perform routing or Layer 2 operations. Candidates might confuse YANG’s role with actual network services instead of recognizing it as a schema that defines how configuration and state data are structured and exchanged. This misunderstanding can lead to selecting incorrect answers that describe network functions rather than data modeling purposes.
Technical deep dive
How to think about this question
YANG is a data modeling language used to define the structure, syntax, and semantics of configuration and operational data exchanged between network devices and controllers. It provides a standardized way to represent network elements and their configurations, enabling automation tools and APIs like NETCONF and RESTCONF to interact with devices consistently. This structured approach allows network programmability by abstracting device-specific details into a common model. In the context of a controller exposing a YANG-modeled interface configuration, YANG acts as the blueprint that describes how interface parameters are organized and validated. The controller uses YANG models to generate API calls that configure devices or retrieve operational state, ensuring that data conforms to expected formats. This standardization simplifies integration across diverse network devices and vendors, which is essential for automation and programmability in modern networks. A common exam trap is confusing YANG's role with actual network functions like IP addressing or protocol operations. YANG does not replace IP addresses or perform Layer 2 functions such as spanning-tree optimization. Instead, it models the data that represents these configurations. Practically, understanding that YANG is about data structure rather than network behavior helps avoid misinterpretation and supports effective use of automation tools in Cisco environments.
KKey Concepts to Remember
- YANG defines a structured data model that represents both configuration and operational state information for network devices.
- Controllers use YANG models to standardize how network elements expose managed data through APIs like NETCONF and RESTCONF.
- YANG enables automation by providing a vendor-neutral schema that abstracts device-specific configurations into a common format.
- YANG models do not perform network functions such as IP addressing or Layer 2 protocol operations; they only describe data structure.
- Using YANG ensures consistent and validated data exchange between network controllers and devices, reducing configuration errors.
- YANG supports programmability by allowing network management tools to interpret and manipulate device configurations reliably.
- YANG’s standardized modeling facilitates multi-vendor interoperability in automated network environments.
- Understanding YANG’s role in data modeling is essential to avoid confusing it with actual network protocols or addressing mechanisms.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A router learns the same prefix from both OSPF and EIGRP. Which route is installed by default?
Question 2
A router shows this output: R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 10.1.1.2 1 FULL/DR 00:00:34 192.168.12.2 GigabitEthernet0/0 10.1.1.3 1 2WAY/DROTHER 00:00:39 192.168.12.3 GigabitEthernet0/0 Which statement is correct?
Question 3
What is the OSPF metric called?
Question 4
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Question 5
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Question 6
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FAQ
Questions learners often ask
What does this 200-301 question test?
YANG defines a structured data model that represents both configuration and operational state information for network devices.
What is the correct answer to this question?
The correct answer is: It provides a structured data model for configuration and operational data — YANG is a modeling language. It defines the structure of network data so controllers and devices can exchange information consistently through APIs such as RESTCONF or NETCONF.
What should I do if I get this 200-301 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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