This N10-009 practice question tests your understanding of network operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A company has a change management policy that requires all network changes to be approved and documented. An administrator needs to replace a faulty switch in the core network. According to best practices, which step should be performed after the replacement is complete?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Update the network diagram.
Updating the network diagram is the correct step because it ensures that the documentation accurately reflects the new switch's location, model, firmware version, and connections. This aligns with change management best practices, which require that all network changes be documented to maintain an accurate source of truth for troubleshooting, capacity planning, and future changes. Without this update, the diagram becomes stale, leading to potential misconfigurations or delays during incident response.
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.
✓
Update the network diagram.
Why this is correct
Documentation must be updated after any change to maintain accurate records for future troubleshooting and auditing.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Roll back to the previous switch.
Why it's wrong here
Rollback is a pre-implementation step if the change fails, not a post-completion step.
✗
Notify users of the change.
Why it's wrong here
User notification should occur before the change, not after it is complete.
✗
Submit a change request.
Why it's wrong here
The change request is submitted and approved before implementation, not after.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the operational step of 'notifying users' (which is part of the change communication plan, not the post-implementation step) with the documentation requirement, leading them to select Option C instead of recognizing that updating the network diagram is the critical final step to close the change record.
Detailed technical explanation
How to think about this question
Network diagrams are often maintained as part of a configuration management database (CMDB) or using tools like Visio, Lucidchart, or NetBox. Under the hood, these diagrams should include device-specific details such as MAC addresses, IP addresses, VLAN assignments, and interface descriptions to support protocols like LLDP or CDP for automated topology discovery. In a real-world scenario, failing to update the diagram after a core switch replacement could cause a network engineer to troubleshoot a downlink based on outdated port mappings, leading to extended outage times.
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 practitioner preparing for the N10-009 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this N10-009 question in full detail.
Network Operations — This question tests Network Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Update the network diagram. — Updating the network diagram is the correct step because it ensures that the documentation accurately reflects the new switch's location, model, firmware version, and connections. This aligns with change management best practices, which require that all network changes be documented to maintain an accurate source of truth for troubleshooting, capacity planning, and future changes. Without this update, the diagram becomes stale, leading to potential misconfigurations or delays during incident response.
What should I do if I get this N10-009 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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