Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
Which statement best describes YANG in the context of network programmability?
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
YANG is a data modeling language for structured network information
This is correct because YANG is used to model configuration and operational data structures.
B
Distractor review
YANG is the encrypted replacement for SSH
This is wrong because YANG is not a remote access protocol.
C
Distractor review
YANG is a trunk encapsulation method
This is wrong because trunk encapsulation belongs to VLAN transport, not data modeling.
D
Distractor review
YANG is an STP election field
This is wrong because YANG is unrelated to spanning-tree elections.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking YANG for a network protocol or physical network feature. For example, some candidates incorrectly think YANG is an encrypted protocol like SSH or a VLAN trunking method. Others confuse it with spanning-tree election fields. These mistakes arise because YANG is often mentioned alongside automation and programmability topics, but it specifically refers to a data modeling language, not a transport or encapsulation technology. Recognizing that YANG defines how network data is structured, rather than how it is transmitted or secured, is key to avoiding this trap.
Technical deep dive
How to think about this question
YANG is a specialized data modeling language designed to define the structure, constraints, and semantics of network configuration and operational data. It provides a standardized way to represent network elements, their attributes, and relationships, enabling consistent data exchange between network devices and management systems. In the context of Cisco networking and CCNA, YANG models are essential for automation and programmability, allowing network engineers to manage devices programmatically rather than manually configuring each device. The decision to use YANG in network programmability stems from its ability to describe network data in a hierarchical and human-readable format, which is machine-processable. Unlike protocols or transport methods, YANG focuses solely on data modeling, serving as the blueprint for how configuration and state data are structured. Cisco devices use YANG models in conjunction with protocols like NETCONF or RESTCONF to enable automated configuration and telemetry, making network management more efficient and less error-prone. A common exam trap is confusing YANG with network protocols or physical network features such as SSH, VLAN trunking, or spanning-tree fields. YANG is not a protocol for remote access, nor is it related to VLAN encapsulation or STP election processes. Understanding that YANG strictly models data structures helps avoid these pitfalls. Practically, network engineers use YANG models to ensure interoperability and consistency across diverse devices and automation tools, which is critical in modern programmable networks.
KKey Concepts to Remember
- YANG defines a standardized data modeling language that structures network configuration and operational data for programmability.
- Cisco devices use YANG models with protocols like NETCONF or RESTCONF to enable automated network management and telemetry.
- YANG models describe hierarchical data structures, making network information machine-readable and consistent across different systems.
- YANG is not a network transport protocol, encryption method, or VLAN encapsulation technique but strictly a data modeling language.
- Automation tools rely on YANG to ensure interoperability and reduce configuration errors in programmable network environments.
- Understanding YANG helps distinguish data modeling from protocols and physical network features in CCNA exam scenarios.
- YANG supports network programmability by providing a common language for device configuration and operational state data.
- Confusing YANG with SSH, VLAN trunking, or STP election fields is a common exam mistake to avoid.
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 modeling language that structures network configuration and operational data for programmability.
What is the correct answer to this question?
The correct answer is: YANG is a data modeling language for structured network information — YANG is a data modeling language used to describe the structure of network configuration and operational data. In plain language, it defines how information should be organized so systems and tools can exchange it consistently. That makes it valuable in programmable networking because devices, controllers, and management systems can work from a shared model instead of inventing incompatible structures. YANG is not a transport protocol, not a cable type, and not a VLAN feature. It belongs to the data-model side of automation and programmability. CCNA questions usually do not expect detailed model-writing ability, but they do expect recognition that YANG helps standardize how network information is represented for automated systems.
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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