- A
The RSPAN VLAN must be created on all switches that participate in the RSPAN session.
Correct because every switch in the path needs the RSPAN VLAN to forward the mirrored traffic.
- B
The RSPAN destination port must be configured in access mode and assigned to the RSPAN VLAN.
Why wrong: Incorrect because the destination port is configured using the 'monitor session destination' command, not as a regular access port.
- C
Trunk ports between switches must allow the RSPAN VLAN and should not prune it.
Correct because if the RSPAN VLAN is pruned, the mirrored traffic will not reach the destination.
- D
The RSPAN source switch encapsulates the mirrored frames with the RSPAN VLAN ID.
Correct because the source switch places the mirrored frames into the RSPAN VLAN for transport.
- E
RSPAN can only monitor source ports on the same switch as the destination port.
Why wrong: Incorrect because RSPAN is specifically designed to monitor sources on different switches than the destination.
CCNP SPAN and RSPAN Practice Question
This 350-401 practice question tests your understanding of span and rspan. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 three statements about RSPAN configuration and behavior are true? (Choose three.)
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
The RSPAN VLAN must be created on all switches that participate in the RSPAN session.
RSPAN requires a dedicated VLAN that is not used for user traffic. The RSPAN VLAN must be created on all switches in the path, and the destination switch must have a destination port configured. The RSPAN VLAN should not be pruned from trunks. The source switch sends mirrored frames into the RSPAN VLAN, and the destination switch extracts them.
Key principle: A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The RSPAN VLAN must be created on all switches that participate in the RSPAN session.
- ✗
The RSPAN destination port must be configured in access mode and assigned to the RSPAN VLAN.
Why it's wrong here
Incorrect because the destination port is configured using the 'monitor session destination' command, not as a regular access port.
- ✓
Trunk ports between switches must allow the RSPAN VLAN and should not prune it.
- ✓
The RSPAN source switch encapsulates the mirrored frames with the RSPAN VLAN ID.
- ✗
RSPAN can only monitor source ports on the same switch as the destination port.
Why it's wrong here
Incorrect because RSPAN is specifically designed to monitor sources on different switches than the destination.
Common exam traps
Common exam trap: an active trunk can still block the VLAN you need
A trunk being up does not prove every VLAN is crossing it. Check allowed VLAN lists, native VLAN mismatch, VLAN existence and access-port assignment.
Trap categories for this question
Command / output trap
Incorrect because the destination port is configured using the 'monitor session destination' command, not as a regular access port.
Detailed technical explanation
How to think about this question
VLAN questions usually combine access-port and trunking clues. The key is to identify whether the issue is local to one switchport, caused by the trunk, or caused by the VLAN not existing where it needs to exist.
KKey Concepts to Remember
- Access ports place end devices into a single VLAN.
- Trunk ports carry multiple VLANs between switches.
- Allowed VLAN lists decide which VLANs can cross a trunk.
- Native VLAN mismatch can create confusing symptoms.
TExam Day Tips
- Use show vlan brief to verify access VLANs.
- Use show interfaces trunk to verify trunk state and allowed VLANs.
- Do not treat every same-VLAN issue as a routing problem.
Key takeaway
A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
Real-world example
How this comes up in practice
A help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.
What to study next
Got this wrong? Here's your next step.
Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related 350-401 questions on switching, trunking, and access-port configuration.
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SPAN and RSPAN — study guide chapter
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FAQ
Questions learners often ask
What does this 350-401 question test?
SPAN and RSPAN — This question tests SPAN and RSPAN — Access ports place end devices into a single VLAN..
What is the correct answer to this question?
The correct answer is: The RSPAN VLAN must be created on all switches that participate in the RSPAN session. — RSPAN requires a dedicated VLAN that is not used for user traffic. The RSPAN VLAN must be created on all switches in the path, and the destination switch must have a destination port configured. The RSPAN VLAN should not be pruned from trunks. The source switch sends mirrored frames into the RSPAN VLAN, and the destination switch extracts them.
What should I do if I get this 350-401 question wrong?
Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related 350-401 questions on switching, trunking, and access-port configuration.
What is the key concept behind this question?
Access ports place end devices into a single VLAN.
About these practice questions
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Last reviewed: Jun 18, 2026
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