Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
What is the main benefit of using a data model such as YANG in network automation?
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 eliminates the need for IP addressing on managed devices.
YANG does not remove basic networking requirements.
B
Best answer
It defines structured data that tools can validate and manipulate consistently.
Correct. That is why YANG is useful in programmable networking.
C
Distractor review
It replaces TLS for secure API transport.
YANG is a data model, not a transport-security mechanism.
D
Distractor review
It forces all devices to run the same operating system.
YANG does not require identical NOS platforms.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is selecting answers that confuse YANG’s purpose with unrelated network functions. For example, thinking YANG eliminates IP addressing or replaces TLS for security is incorrect because YANG only models data structure, not network protocols or security layers. Another trap is assuming YANG forces uniform device operating systems, but YANG is vendor-neutral and supports diverse platforms. Candidates must avoid these misconceptions by focusing on YANG’s role in defining structured, validated data models that automation tools use to manipulate network configurations consistently.
Technical deep dive
How to think about this question
YANG is a data modeling language specifically designed for network configuration and state data. It provides a hierarchical, structured format that describes how data is organized, what types of data are valid, and the relationships between data elements. This structure allows network automation tools to parse, validate, and manipulate device configurations and operational states consistently, regardless of vendor or device type. YANG models are used with protocols like NETCONF and RESTCONF to programmatically manage network devices. The core benefit of YANG in network automation is that it defines a consistent schema for data, enabling automation tools to validate data correctness before pushing changes. This validation prevents configuration errors and ensures that automation scripts behave predictably. Unlike transport protocols or security mechanisms, YANG focuses solely on data structure, allowing it to be combined with secure transport protocols such as TLS or SSH. This separation of concerns makes YANG a foundational element in modern programmable networks. A common exam trap is confusing YANG’s role with transport security or device operating system requirements. YANG does not replace TLS or SSH for securing API communications, nor does it mandate that all devices run the same network OS. Instead, YANG provides a vendor-neutral data model that supports diverse devices and platforms. Practically, this means network engineers can automate heterogeneous environments reliably, leveraging YANG models to ensure consistent configuration and operational data handling across Cisco and third-party devices.
KKey Concepts to Remember
- YANG defines a standardized data modeling language that structures network configuration and state data for consistent automation.
- Network automation tools use YANG models to validate data syntax and semantics before applying configurations to devices.
- YANG models enable interoperability by providing a vendor-neutral format that different network devices and management systems understand.
- YANG does not handle transport security; protocols like NETCONF or RESTCONF use TLS or SSH to secure data transmission.
- Using YANG allows automation scripts to manipulate network device data reliably, reducing human errors in configuration tasks.
- YANG models separate data structure from device operating systems, so devices do not need identical NOS to be managed.
- Automation frameworks leverage YANG to generate APIs that simplify programming and integration with network controllers.
- YANG improves network programmability by providing a clear schema for both configuration and operational data, enhancing troubleshooting.
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 state data for consistent automation.
What is the correct answer to this question?
The correct answer is: It defines structured data that tools can validate and manipulate consistently. — YANG provides a structured, consistent way to define configuration and operational data, which improves automation reliability.
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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