Drag or tap steps into the slots.
Steps
Order
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CCNA CRC errors Practice Question
Drag and drop the following troubleshooting steps into the correct order to isolate CRC errors, duplex mismatches, and flapping on a Cisco IOS-XE interface.
⚠ Common exam trap
Do not skip clearing counters before verification. After applying changes, you must clear the counters to remove old error data, then verify that new errors do not appear. The correct order is gather, apply, clear, verify.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use show commands to gather interface statistics and identify errors.
The correct troubleshooting order is: first, use show commands to gather interface statistics and identify CRC errors, duplex mismatches, and flapping (Step A). Next, apply configuration changes to resolve the identified issues (Step C). Then, clear interface counters to reset the statistics (Step B). Finally, verify the fix by monitoring interface statistics after clearing counters (Step D). This order ensures that after applying changes, you clear the old error data so that verification shows only new errors, confirming the fix. Clearing counters before verification provides a clean baseline.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use show commands to gather interface statistics and identify errors.
Why this is correct
Step A: Use show commands to gather interface statistics and identify errors. This is the first step because you need data before making changes.
- ✓
Clear interface counters to reset statistics.
Why this is correct
Step B: Clear interface counters. This step should come after applying changes (Step C) but before verification (Step D) to reset the statistics to zero, ensuring that verification shows only post-fix errors.
- ✓
Apply configuration changes to resolve the identified issues.
Why this is correct
Step C: Apply configuration changes to resolve the identified issues. This step logically follows gathering data (Step A) and precedes clearing counters (Step B) and verification (Step D).
- ✓
Verify the fix by monitoring interface statistics after clearing counters.
Why this is correct
Step D: Verify the fix by monitoring interface statistics. This is the final step, done after clearing counters (Step B), so that you are checking for new errors on a clean baseline.
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YAML Data Format
Key term
Interface
An interface is a point of connection or interaction between two systems, devices, or software components that allows them to exchange information or signals.
Key term
Baseline
A baseline is a documented starting point for the normal performance and behavior of a system, network, or component, used to detect changes and troubleshoot issues.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-301 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-301 exam.