Question 16 of 2,015
SPAN and RSPANmediumDrag & DropObjective-mapped

Quick Answer

The correct order for local SPAN configuration steps on Cisco IOS begins with removing any existing SPAN session, then specifying the source interfaces or VLANs to monitor, defining the destination interface for the analyzer, optionally enabling encapsulation replication for trunk ports, and finally verifying the session is active. This sequence is critical because SPAN sessions are mutually exclusive on a switch; failing to clear a prior session with `no monitor session 1` will cause the new configuration to be rejected or overwrite the old one incorrectly. On the ENCOR 350-401 exam, this drag-and-drop task tests your ability to recall the exact CLI workflow, often with a trap that places the verification step too early or omits the removal step entirely. A common memory tip is the acronym **R-S-D-E-V**: Remove, Source, Destination, Encapsulation (optional), Verify—think of it as “Remove the old, Source what you watch, Destination where it goes, Encapsulate if trunked, then Verify the catch.”

CCNP SPAN and RSPAN Practice Question

This 350-401 practice question tests your understanding of span and rspan. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.

Drag and drop the steps of configuring a local SPAN session on a Cisco IOS switch into the correct order, from first to last.

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

  • Clue: "first"

    Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

Question 1mediumdrag order
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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

Clear any existing SPAN session configuration

The correct order begins with removing any existing SPAN session, then specifying the source interfaces or VLANs to monitor, then defining the destination interface for the analyzer, then optionally enabling encapsulation replication for trunk ports, and finally verifying the session is active.

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.

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.

Related practice questions

Related 350-401 practice-question pages

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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: Clear any existing SPAN session configuration — The correct order begins with removing any existing SPAN session, then specifying the source interfaces or VLANs to monitor, then defining the destination interface for the analyzer, then optionally enabling encapsulation replication for trunk ports, and finally verifying the session is active.

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.

Are there clue words in this question I should notice?

Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

What is the key concept behind this question?

Access ports place end devices into a single VLAN.

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Last reviewed: Jun 18, 2026

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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.