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CCNA Switching and Network Access Practice Question
What is the correct order of steps to capture and analyze traffic on IOS-XE using the embedded packet capture feature, and in Wireshark to isolate a Layer 2 or Layer 3 fault?
⚠ Common exam trap
Do not confuse the order of operations: you must define the capture point before starting, and you must stop the capture before exporting. Also, remember that analysis is done externally, not on the router itself.
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
✓
Define the capture point with interface and optional filter, then start the capture, stop it, and export the capture file for analysis in Wireshark.
The correct order for embedded packet capture on IOS-XE is to first define the capture point with the desired interface and optional filter, then start the capture, stop it after capturing the needed traffic, and finally export the file for analysis in Wireshark. Option A accurately reflects this sequence. Option B fails because the capture must be defined before starting. Option C fails because exporting should occur after stopping the capture. Option D fails because analysis is performed externally, not on the router.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Define the capture point with interface and optional filter, then start the capture, stop it, and export the capture file for analysis in Wireshark.
Why this is correct
This sequence is correct because the capture point must be defined with the interface and an optional filter (such as an ACL or class-map) before any traffic is collected; otherwise the router has no instructions on what or where to capture. After defining, starting the capture begins filling the local buffer, and stopping it finalizes the PCAP data so that all captured packets are consistent. The final export to an external file is required because IOS-XE lacks the built-in protocol-analysis depth of Wireshark, so the saved capture must be transferred via TFTP, FTP, or HTTP for detailed inspection.
- ✗
Start the capture immediately, then define the capture point with interface and filter, stop the capture, and export the file for analysis.
Why it's wrong here
This fails because a capture point does not exist when you try to start it; in IOS-XE, the monitor capture process requires an existing capture point with an interface binding before the 'start' command is recognized. If you start first, the router returns an error or captures nothing because there is no buffer or filter configured, so the subsequent 'define' step is meaningless after the fact. Proper order is mandatory: define the capture point, then start it, or no packets will be collected.
- ✗
Define the capture point, start the capture, export the file, and then stop the capture.
Why it's wrong here
This is wrong because exporting while the capture is still running accesses the buffer while it is actively being written, which can result in a truncated or corrupted PCAP file. Once you issue the export command, the router gathers the current buffer contents, but new packets may arrive mid-export or the buffer may be overwritten, leading to an incomplete capture. You must issue the 'stop' command first to freeze the buffer, then export to ensure all captured frames are included and in the correct sequence.
- ✗
Define the capture point, start the capture, stop it, then analyze the capture directly on the router without exporting.
Why it's wrong here
This is incorrect because IOS-XE's command-line interface does not provide a built-in Wireshark-like analyzer for detailed protocol decoding; you can only view brief packet summaries or hex dumps, which are inadequate for deep analysis. The embedded Packet Capture feature is designed to write a standard PCAP file that must be exported to an external tool such as Wireshark for thorough inspection. Without exporting, you lose the ability to effectively filter, decode, and troubleshoot using the full feature set of a dedicated analyzer.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
✓Define the capture point with interface and optional filter, then start the capture, stop it, and export the capture file for analysis in Wireshark.Correct answer▾
Why this is correct
This sequence is correct because the capture point must be defined with the interface and an optional filter (such as an ACL or class-map) before any traffic is collected; otherwise the router has no instructions on what or where to capture. After defining, starting the capture begins filling the local buffer, and stopping it finalizes the PCAP data so that all captured packets are consistent. The final export to an external file is required because IOS-XE lacks the built-in protocol-analysis depth of Wireshark, so the saved capture must be transferred via TFTP, FTP, or HTTP for detailed inspection.
✗Start the capture immediately, then define the capture point with interface and filter, stop the capture, and export the file for analysis.Wrong answer — click to see why▾
Why this is wrong here
Starting the capture before defining the capture point is invalid; the capture parameters must be configured first.
Why candidates choose this
Candidates might think that starting the capture is the first step, similar to enabling a debug, but EPC requires configuration first.
✗Define the capture point, start the capture, export the file, and then stop the capture.Wrong answer — click to see why▾
Why this is wrong here
Exporting before stopping the capture is incorrect; the capture must be stopped before the file can be safely exported.
Why candidates choose this
Candidates may think exporting is just copying a buffer that can be done anytime, but the capture must be stopped to finalize the file.
✗Define the capture point, start the capture, stop it, then analyze the capture directly on the router without exporting.Wrong answer — click to see why▾
Why this is wrong here
The embedded packet capture feature requires exporting the file for analysis on an external tool like Wireshark; analysis is not performed on the router itself.
Why candidates choose this
Candidates might assume that since the router has the capture, it can also analyze it, but IOS-XE lacks a full packet analyzer.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Visual reference
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Related to this question
Learn chapter
Interpreting Packet Capture Output for Layer 2/3 Troubleshooting
Key term
Packet capture
Packet capture is the process of intercepting and recording data packets traveling over a computer network for analysis.
Key term
Wireshark
Wireshark is a free, open-source network protocol analyzer that captures and inspects data packets traveling over a computer network in real time.
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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.