- A
The RSPAN VLAN must be allowed on all trunk links between the source and destination switches.
Correct because the RSPAN VLAN carries mirrored traffic across the network and must be permitted on all intermediate trunks.
- B
The RSPAN VLAN can be used for normal data traffic if needed.
Why wrong: Incorrect because the RSPAN VLAN is dedicated to carrying mirrored traffic; using it for data traffic can cause issues.
- C
On the destination switch, the RSPAN destination port is placed into the RSPAN VLAN.
Correct because the destination port must be in the RSPAN VLAN to receive the mirrored traffic.
- D
RSPAN supports egress mirroring on the source switch.
Why wrong: Incorrect because RSPAN on the source switch only supports ingress mirroring; egress is not supported.
- E
The RSPAN VLAN must be configured on all switches in the path between source and destination.
Correct because each switch in the path needs to have the RSPAN VLAN defined to forward the mirrored traffic.
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 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 allowed on all trunk links between the source and destination switches.
RSPAN uses a dedicated VLAN that must be allowed on trunk links between switches. The RSPAN VLAN should not be used for any other traffic. The destination port on the remote switch is placed in the RSPAN VLAN. RSPAN does not support egress mirroring on the source switch (only ingress). The RSPAN VLAN does not participate in STP normally, but it can be configured to do so.
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 allowed on all trunk links between the source and destination switches.
- ✗
The RSPAN VLAN can be used for normal data traffic if needed.
Why it's wrong here
Incorrect because the RSPAN VLAN is dedicated to carrying mirrored traffic; using it for data traffic can cause issues.
- ✓
On the destination switch, the RSPAN destination port is placed into the RSPAN VLAN.
- ✗
RSPAN supports egress mirroring on the source switch.
Why it's wrong here
Incorrect because RSPAN on the source switch only supports ingress mirroring; egress is not supported.
- ✓
The RSPAN VLAN must be configured on all switches in the path between source and 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.
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 allowed on all trunk links between the source and destination switches. — RSPAN uses a dedicated VLAN that must be allowed on trunk links between switches. The RSPAN VLAN should not be used for any other traffic. The destination port on the remote switch is placed in the RSPAN VLAN. RSPAN does not support egress mirroring on the source switch (only ingress). The RSPAN VLAN does not participate in STP normally, but it can be configured to do so.
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
This 350-401 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 350-401 exam.
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