Question 1mediummulti select
Full question →mediummulti selectObjective-mapped
Which two statements about YANG are correct?
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 defines structured models for configuration and state data
That is the core purpose of YANG.
B
Best answer
It is commonly associated with NETCONF and RESTCONF
Those protocols often use YANG-defined data models.
C
Distractor review
It is a replacement for OSPF adjacency formation
YANG is not a routing protocol.
D
Distractor review
It is the same thing as JSON syntax
JSON is a data format, not the model definition language.
E
Distractor review
It automatically discovers neighbors on a LAN
Again, not its role.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A common exam trap is mistaking YANG for a routing protocol or a data format. Some candidates incorrectly believe YANG replaces protocols like OSPF for adjacency formation or that it is the same as JSON syntax. This confusion arises because YANG models can be encoded in JSON or XML, but YANG itself is a modeling language, not a transport or routing protocol. Misunderstanding this can lead to selecting incorrect answers that describe YANG as performing routing or neighbor discovery functions, which it does not. Recognizing YANG’s role as a data modeling language avoids this pitfall.
Technical deep dive
How to think about this question
YANG is a data modeling language designed specifically for network configuration and state data. It provides a standardized way to define the structure, constraints, and semantics of network device configurations and operational state information. YANG models describe how data is organized and manipulated, enabling consistent and automated management of network devices across different vendors and platforms. In the context of Cisco networking and the CCNA exam, YANG is primarily used alongside protocols like NETCONF and RESTCONF. These protocols use YANG models to exchange configuration and state data between network management systems and devices. YANG itself is not a transport protocol but a schema language that ensures the data exchanged is well-structured and validated. This separation allows network automation tools to programmatically interact with devices using standardized models. A common exam trap is confusing YANG with routing protocols or data formats. YANG does not perform routing functions like OSPF adjacency formation, nor is it a data serialization format like JSON. Instead, YANG models can be encoded in XML or JSON syntax for transport, but the language itself defines the data structure and rules. Understanding this distinction helps avoid misinterpreting YANG’s role in network programmability and automation.
KKey Concepts to Remember
- YANG defines structured data models that describe both configuration and operational state information on network devices.
- YANG models are used by network management protocols such as NETCONF and RESTCONF to standardize device configuration and state retrieval.
- YANG is a modeling language, not a transport protocol or a routing protocol like OSPF or EIGRP.
- YANG models can be encoded in XML or JSON formats but are distinct from these data serialization syntaxes.
- Using YANG enables consistent automation and programmability across multi-vendor network environments.
- YANG helps network engineers validate configuration data against defined schemas to prevent errors during automated deployments.
- YANG does not perform network functions such as neighbor discovery or routing adjacency formation.
- Understanding YANG’s role in network automation is critical for leveraging modern Cisco programmability tools effectively.
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 structured data models that describe both configuration and operational state information on network devices.
What is the correct answer to this question?
The correct answer is: It defines structured models for configuration and state data — YANG is a data modeling language used to describe configuration and operational state. It is commonly used with NETCONF and RESTCONF, but it is not itself the transport 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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