The correct statement is that the session is an RSPAN source session, and the mirrored traffic is sent to Gi0/5. This is because the output explicitly shows "Type : Remote Source Session," meaning the switch is acting as the RSPAN source, capturing traffic from source port Gi0/4 (both directions) and source VLAN 100 (RX only), then forwarding the mirrored copy to the destination port Gi0/5. In RSPAN, the destination port must be a trunk carrying the designated RSPAN VLAN to transport the traffic to a remote switch for analysis. On the Cisco CCNP ENARSI 300-410 exam, this question tests your ability to distinguish between local SPAN, RSPAN source, and RSPAN destination sessions—a common trap is confusing "Remote Source Session" with a local SPAN or assuming the destination port is an analyzer directly attached. Remember the key: an RSPAN source session always sends mirrored traffic out a trunk port toward a remote destination switch, never to a directly connected monitor. A helpful memory tip is "Source sends, destination receives—if it says 'Remote Source,' the traffic is leaving the box."
300-410 SPAN, RSPAN, and ERSPAN Practice Question
This 300-410 practice question tests your understanding of span, rspan, and erspan. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
A network engineer runs the following command on switch SW2:
SW2# show monitor session 2
Session 2
---------
Type : Remote Source Session
Source Ports :
Both : Gi0/4
Source VLANs :
RX Only : 100
Destination Ports : Gi0/5
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The session is an RSPAN source session, and the mirrored traffic is sent to Gi0/5.
This is a remote source session (RSPAN source session). It monitors source port Gi0/4 and source VLAN 100 (RX only), and sends the mirrored traffic to destination port Gi0/5, which is typically configured as a trunk port carrying the RSPAN VLAN. The session is correctly configured for RSPAN.
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 session is an RSPAN source session, and the mirrored traffic is sent to Gi0/5.
Why this is correct
The type 'Remote Source Session' indicates RSPAN source, and the destination port Gi0/5 receives the mirrored traffic.
Related concept
Access ports place end devices into a single VLAN.
✗
The session is an ERSPAN source session because it monitors VLAN 100.
Why it's wrong here
ERSPAN is for IP-based encapsulation, not VLAN-based. This is RSPAN.
✗
The session is a local SPAN session with source VLAN.
Why it's wrong here
The type explicitly says 'Remote Source Session', not local.
✗
The session is misconfigured because source VLANs cannot be combined with source ports.
Why it's wrong here
RSPAN source sessions can include both source ports and source VLANs.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
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 300-410 questions on switching, trunking, and access-port configuration.
SPAN, RSPAN, and ERSPAN — This question tests SPAN, RSPAN, and ERSPAN — Access ports place end devices into a single VLAN..
What is the correct answer to this question?
The correct answer is: The session is an RSPAN source session, and the mirrored traffic is sent to Gi0/5. — This is a remote source session (RSPAN source session). It monitors source port Gi0/4 and source VLAN 100 (RX only), and sends the mirrored traffic to destination port Gi0/5, which is typically configured as a trunk port carrying the RSPAN VLAN. The session is correctly configured for RSPAN.
What should I do if I get this 300-410 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 300-410 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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A network engineer runs the following command to troubleshoot an RSPAN issue:
R1# show monitor session 4 detail
Session 4
---------
Type : Remote Destination Session
Source RSPAN VLAN : 100
Destination Ports : Gi0/2
Encapsulation : Native
Ingress : Disabled
What does this output indicate?
medium
✓ A.The session is correctly configured as an RSPAN destination session.
B.The session is misconfigured because the source must be a port, not a VLAN.
C.The session is misconfigured because the destination port must have ingress enabled.
D.The session is misconfigured because the RSPAN VLAN must be the same as the source VLAN.
Why A: The output shows an RSPAN destination session with source RSPAN VLAN 100 and destination port Gi0/2. This is the destination side of an RSPAN configuration.
Variation 2. A network engineer runs the following command on switch SW3:
SW3# show monitor session 3
Session 3
---------
Type : Remote Destination Session
Source Ports :
RX Only : Gi0/6
Destination Ports : Gi0/7
Encapsulation : Native
Ingress : Disabled
Based on this output, which statement is correct?
medium
✓ A.The session is an RSPAN destination session, and traffic from the RSPAN VLAN is received on Gi0/6 and sent to Gi0/7.
B.The session is an ERSPAN destination session because it uses RX only.
C.The session is a local SPAN session with source port Gi0/6.
D.The session is misconfigured because the destination port has ingress disabled.
Why A: This is an RSPAN destination session. It receives mirrored traffic from the RSPAN VLAN via source port Gi0/6 (RX only) and sends it to destination port Gi0/7 for analysis. The source port is typically a trunk port carrying the RSPAN VLAN.
Variation 3. A network engineer runs the following command on switch SW6:
SW6# show monitor session 8
Session 8
---------
Type : Remote Source Session
Source Ports :
Both : Gi0/13
Source VLANs :
TX Only : 200
Destination Ports : Gi0/14
Encapsulation : Dot1q
Ingress : Disabled
Based on this output, which statement is correct?
hard
✓ A.The RSPAN source session sends mirrored traffic to Gi0/14 with a Dot1q tag.
B.The RSPAN source session sends mirrored traffic to Gi0/14 without any VLAN tag.
C.The session is an ERSPAN source session because it uses Dot1q encapsulation.
D.The session is misconfigured because source VLANs cannot be TX only.
Why A: This is an RSPAN source session. It monitors source port Gi0/13 and source VLAN 200 (TX only), and sends the mirrored traffic to destination port Gi0/14 with Dot1q encapsulation. The Dot1q encapsulation indicates that the destination port is a trunk port carrying the RSPAN VLAN. The session is correctly configured.
Last reviewed: Jun 19, 2026
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