Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
Which statement best describes YANG in a network automation context?
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
Distractor review
It is a transport protocol that replaces HTTPS
YANG is not a transport protocol.
B
Best answer
It is a data modeling language for configuration and operational data
That is the core purpose of YANG.
C
Distractor review
It is a Cisco-only scripting language for switch automation
YANG is an industry-standard modeling language, not a Cisco-only scripting language.
D
Distractor review
It is a logging format used by telemetry collectors
Telemetry may carry data defined by models, but YANG itself is not a logging format.
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 Cisco-specific scripting language. Some candidates incorrectly believe YANG replaces HTTPS or acts as a proprietary automation script. This misunderstanding leads to selecting options that describe transport or scripting functions rather than data modeling. YANG is not a protocol that moves data; it defines the data's structure. Confusing YANG with telemetry logging formats is another trap, as telemetry uses YANG models but YANG itself is not a logging format. Recognizing YANG as a vendor-neutral data modeling language is key to avoiding these pitfalls.
Technical deep dive
How to think about this question
YANG is a standardized data modeling language used in network automation to define the structure and semantics of configuration and operational data. It provides a formal way to describe network device configurations, state data, and remote procedure calls, enabling consistent and automated management across diverse network devices. YANG models are used by protocols like NETCONF and RESTCONF to exchange configuration and state information between network controllers and devices. In the CCNA context, understanding YANG is crucial because it underpins modern network programmability and automation frameworks. YANG models describe the data that automation tools manipulate, ensuring that configuration changes and telemetry data are structured and interoperable. This allows network engineers to automate tasks such as device provisioning, configuration validation, and monitoring using standardized models rather than proprietary scripts. A common exam trap is confusing YANG with transport protocols or scripting languages. YANG itself does not transport data nor execute commands; instead, it defines the data structure that transport protocols like NETCONF or RESTCONF use. Practically, Cisco devices support YANG models to enable automation and programmability, making it essential to distinguish YANG as a modeling language rather than a protocol or logging format.
KKey Concepts to Remember
- YANG defines the structure and semantics of configuration and operational data used in network automation.
- Network automation protocols like NETCONF and RESTCONF use YANG models to exchange configuration and state information.
- YANG is a vendor-neutral language that enables consistent data modeling across diverse network devices.
- YANG does not transport data but provides the schema that transport protocols use to communicate configuration.
- Understanding YANG is essential for automating device configuration and monitoring in modern Cisco networks.
- YANG models describe both configuration data and operational state, supporting comprehensive network management.
- Confusing YANG with transport protocols or scripting languages is a common exam mistake to avoid.
- Telemetry data collectors may use YANG models, but YANG itself is not a logging or data collection format.
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 the structure and semantics of configuration and operational data used in network automation.
What is the correct answer to this question?
The correct answer is: It is a data modeling language for configuration and operational data — YANG is a data modeling language used to describe configuration and operational state. It defines the structure of the data; protocols such as NETCONF or RESTCONF transport that data.
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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