Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
Why are data models such as YANG important 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
Best answer
They define a structured way to represent configuration and state data
Correct. Structured data models are foundational to automation workflows.
B
Distractor review
They replace IPv4 and IPv6 addressing
They do not replace IP addressing.
C
Distractor review
They remove the need for routing protocols
Routing protocols are still needed where appropriate.
D
Distractor review
They are used only for naming wireless SSIDs
YANG is much broader than wireless SSID naming.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A common exam trap is to mistakenly believe that YANG data models replace fundamental network functions such as IPv4/IPv6 addressing or routing protocols. Some candidates incorrectly assume that because YANG structures configuration data, it eliminates the need for routing protocols like OSPF or EIGRP, or that it changes how IP addresses function. However, YANG is strictly a modeling language that describes how configuration and state data are represented for automation purposes. It does not alter core networking protocols or addressing schemes. Confusing these roles can lead to selecting incorrect answers that misattribute YANG’s purpose.
Technical deep dive
How to think about this question
Data models such as YANG provide a standardized, structured way to represent network device configuration and operational state data. YANG uses a hierarchical, tree-like structure to define data elements, their types, and relationships, enabling consistent interpretation across different devices and vendors. This structured approach is essential for automation because it allows network management tools and APIs to programmatically read, modify, and validate configurations without ambiguity. In the context of network automation, YANG models serve as the foundation for protocols like NETCONF and RESTCONF, which use these models to exchange configuration and state information between controllers and network devices. By defining a common data schema, YANG ensures that automation scripts and orchestration platforms can reliably interact with devices, regardless of underlying hardware or software differences. This consistency reduces errors and simplifies the deployment of automated workflows for tasks such as provisioning VLANs, ACLs, or routing protocols. A common exam trap is confusing YANG data models with fundamental network functions like IP addressing or routing protocols. YANG does not replace IPv4 or IPv6 addressing schemes, nor does it eliminate the need for routing protocols such as OSPF or EIGRP. Instead, YANG complements these technologies by providing a standardized method to represent and manipulate their configurations programmatically. Practically, understanding YANG’s role helps network engineers automate complex configurations while maintaining network stability and compliance.
KKey Concepts to Remember
- YANG data models define a structured and standardized way to represent network device configuration and operational state data.
- Automation tools use YANG models to ensure consistent interpretation and manipulation of network configurations across different vendors.
- YANG supports protocols like NETCONF and RESTCONF, which rely on these models to exchange configuration and state information programmatically.
- Structured data models reduce configuration errors by enabling validation and uniform data representation in network automation workflows.
- YANG does not replace IP addressing schemes such as IPv4 or IPv6 but complements them by modeling their configuration parameters.
- Routing protocols like OSPF and EIGRP remain necessary for network operation and are configured using data models like YANG in automated environments.
- Understanding YANG helps network engineers automate complex tasks such as VLAN provisioning, ACL deployment, and routing configuration reliably.
- YANG models improve network programmability by providing a vendor-neutral schema that automation platforms use to interact with diverse network devices.
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 data models define a structured and standardized way to represent network device configuration and operational state data.
What is the correct answer to this question?
The correct answer is: They define a structured way to represent configuration and state data — Data models such as YANG standardize how configuration and operational data are described, which improves consistency for automation systems and APIs.
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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