The answer is that model-driven programmability with NETCONF/RESTCONF allows network devices to be managed using any programming language with HTTP libraries, which is a key benefit over traditional CLI scripting. This is correct because NETCONF and RESTCONF use structured, machine-readable data formats like XML and JSON, eliminating the need for fragile screen-scraping or regex-based parsing of CLI output. On the Cisco DevNet Associate 200-901 exam, this question tests your understanding of why model-driven approaches improve automation reliability and integration—a common trap is thinking CLI scripting is easier, but the exam emphasizes that structured data enables consistent validation and cross-platform compatibility. Remember the memory tip: "CLI scripts scrape text; NETCONF/RESTCONF exchange structured facts."
200-901 Cisco Platforms and Development Practice Question
This 200-901 practice question tests your understanding of cisco platforms and development. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO are benefits of using model-driven programmability (e.g., NETCONF/RESTCONF) over traditional CLI scripting for network automation?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Data is structured and machine-readable (e.g., XML/JSON).
Option D is correct because model-driven programmability with NETCONF/RESTCONF uses structured data formats like XML or JSON, which are machine-readable. This eliminates the need for screen-scraping or parsing CLI output, making automation scripts more reliable and easier to maintain. Structured data also enables consistent validation and integration with other systems.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Reduces network latency because it uses a lighter protocol.
Why it's wrong here
Model-driven protocols may add overhead.
✗
Requires no additional learning beyond CLI commands.
Why it's wrong here
Model-driven approaches require understanding of YANG models.
✗
Easier to debug because it uses the same syntax as CLI.
Why it's wrong here
Different syntax, not easier.
✓
Data is structured and machine-readable (e.g., XML/JSON).
Why this is correct
Model-driven APIs return structured data.
Related concept
Read the scenario before looking for a memorised answer.
✓
Allows network devices to be managed using any programming language with HTTP libraries.
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that model-driven programmability is just a 'new way to type CLI commands,' but the key benefit is the use of structured, machine-readable data (XML/JSON) and protocol-level operations that decouple automation from device-specific CLI syntax.
Detailed technical explanation
How to think about this question
NETCONF (RFC 6241) uses SSH as a transport and encodes operations in XML, while RESTCONF (RFC 8040) uses HTTP methods (GET, POST, PUT, DELETE) and supports both XML and JSON. YANG (RFC 7950) defines the data models that structure the configuration and state data, enabling deterministic and validated operations. In a real-world scenario, a Python script using the ncclient library can retrieve interface statistics via NETCONF with a single <get> RPC, whereas CLI scripting would require parsing 'show interfaces' output, which varies by device and software version.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Cisco Platforms and Development — This question tests Cisco Platforms and Development — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Data is structured and machine-readable (e.g., XML/JSON). — Option D is correct because model-driven programmability with NETCONF/RESTCONF uses structured data formats like XML or JSON, which are machine-readable. This eliminates the need for screen-scraping or parsing CLI output, making automation scripts more reliable and easier to maintain. Structured data also enables consistent validation and integration with other systems.
What should I do if I get this 200-901 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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