100-140 Question 37
Single answerA customer reports that after a recent configuration change in their network, their employees are experiencing slow connectivity to a critical web application. You are tasked to troubleshoot the issue. After identifying the change, you decide to observe the impact of undoing that change. Which step should you prioritize to ensure the issue is resolved effectively?
- A
Revert the change and observe the application performance immediately.
- B
Reboot all network devices to clear cached configurations.
- C
Perform a packet capture to verify traffic flow before and after reverting the change.
- D
Document the change and escalate the issue to network engineering without reverting it.
Show answer and explanation
Correct answer: C
Explanation
When troubleshooting configuration changes, it is critical to observe the results of reversing the change while gathering evidence, such as packet captures, to confirm whether the change is the root cause. This approach ensures a methodical resolution process without unnecessary disruptions.
- A. Incorrect.
Reverting the change immediately without observing traffic flow might resolve the issue, but it doesn’t provide insights into whether the change was indeed the root cause.
- B. Incorrect.
Rebooting all network devices is unnecessary and could cause a service disruption, especially if the issue is tied to the recent configuration change.
- C. Correct.
Performing a packet capture before and after reverting the change allows you to analyze the impact of the change on network traffic, confirming whether it caused the issue.
- D. Incorrect.
Documenting the change and escalating without reverting it delays troubleshooting and does not provide immediate resolution or insights into the issue.