Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
Which statement best describes YANG at a basic CCNA automation level?
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 is a data-modeling language used to describe network configuration and state.
This is correct because YANG is about structured modeling of network information.
B
Distractor review
It is the secure transport protocol used instead of HTTPS.
This is wrong because YANG is not a transport protocol.
C
Distractor review
It is the BGP path-selection algorithm.
This is wrong because YANG is not a routing algorithm.
D
Distractor review
It is the default CAPWAP discovery message.
This is wrong because YANG is unrelated to CAPWAP discovery.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking YANG for a transport protocol or a routing algorithm because the question mentions network automation and programmability. Candidates might incorrectly select options related to secure transport protocols or routing processes, such as HTTPS or BGP, due to familiarity with these terms. However, YANG is neither a transport protocol nor a routing algorithm; it is a data modeling language that defines the structure of network configuration and state data. Misunderstanding this distinction can lead to incorrect answers, especially under time pressure.
Technical deep dive
How to think about this question
YANG is a data modeling language specifically designed to represent configuration and state data for network devices in a structured, hierarchical format. It enables network engineers and automation tools to define how network information is organized, making it easier to programmatically manage devices. YANG models describe the schema for network elements, including interfaces, routing protocols, and device parameters, which is essential for modern network programmability and automation. In the context of CCNA-level automation, understanding YANG means recognizing it as the foundation for model-driven network management. Unlike protocols or transport mechanisms, YANG itself does not move data but defines the structure and semantics of the data exchanged. Network management protocols like NETCONF or RESTCONF use YANG models to validate and manipulate device configurations, ensuring consistency and automation accuracy. A common exam trap is confusing YANG with transport protocols or routing algorithms. YANG is not a protocol like HTTPS or a routing process like BGP; it is a modeling language that underpins how configuration data is represented and manipulated. Practically, this means that when automating network tasks, YANG models provide the blueprint for what data can be configured or monitored, enabling tools to interact with devices in a standardized way.
KKey Concepts to Remember
- YANG defines a standardized data model that describes network device configuration and operational state in a hierarchical and structured format.
- Network automation tools use YANG models to validate and manipulate device configurations programmatically, enabling consistent and error-free management.
- YANG itself is not a transport protocol but serves as the schema for data exchanged by protocols like NETCONF and RESTCONF.
- Understanding YANG helps network engineers transition from manual CLI configuration to model-driven automation approaches.
- YANG models describe network elements such as interfaces, routing protocols, and device parameters, facilitating interoperability across different vendors.
- YANG’s structured approach allows automation systems to parse and generate configuration data reliably, reducing human error in network management.
- Confusing YANG with routing algorithms or transport protocols is a common mistake; it strictly defines data structure, not data transmission or routing behavior.
- YANG supports the shift toward software-defined networking by enabling programmability and automation through standardized data representations.
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
A non-root switch has two uplinks toward the root bridge. One path has a lower total STP cost than the other. What role will the lower-cost uplink have?
Question 5
A router interface applies this ACL inbound: 10 deny tcp any any eq 80 20 permit ip any any A user reports that web browsing to a server by IP address fails, but ping works. Which statement best explains the behavior?
Question 6
A router learns route 198.51.100.0/24 from OSPF with AD 110 and also has a static route to the same prefix configured with AD 150. Which route is installed?
FAQ
Questions learners often ask
What does this 200-301 question test?
YANG defines a standardized data model that describes network device configuration and operational state in a hierarchical and structured format.
What is the correct answer to this question?
The correct answer is: It is a data-modeling language used to describe network configuration and state. — YANG is a data-modeling language used to describe network configuration and state in a structured way. In practical terms, it helps define how information should be represented for more programmatic and model-driven interaction with network devices. It is part of the broader shift toward structured automation. The important thing at this level is to recognize YANG as a modeling concept, not as a transport protocol or a routing protocol.
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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