This 350-401 practice question tests your understanding of spanning tree protocol. 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.
spanning-tree vlan 10 priority 4096
What is the effect of this global configuration command?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The switch will have a bridge priority of 4096 for VLAN 10, increasing its chance to become root bridge.
This sets the bridge priority for VLAN 10 to 4096, making the switch more likely to become the root bridge for that VLAN.
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 switch will have a bridge priority of 4096 for VLAN 10, increasing its chance to become root bridge.
Why this is correct
Lower priority value is preferred; 4096 is lower than default 32768.
Related concept
Access ports place end devices into a single VLAN.
✗
The switch will have a bridge priority of 4096 for all VLANs.
Why it's wrong here
The command is VLAN-specific; only VLAN 10 is affected.
✗
The switch will become the root bridge for VLAN 10 immediately.
Why it's wrong here
It only increases the chance; other switches with lower priority still win.
✗
The switch will have a bridge priority of 4096 for VLAN 10 and all other VLANs will use 32768.
Why it's wrong here
Other VLANs keep default priority unless separately configured.
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
The command is VLAN-specific; only VLAN 10 is affected.
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 350-401 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 350-401 questions on switching, trunking, and access-port configuration.
Spanning Tree Protocol — This question tests Spanning Tree Protocol — Access ports place end devices into a single VLAN..
What is the correct answer to this question?
The correct answer is: The switch will have a bridge priority of 4096 for VLAN 10, increasing its chance to become root bridge. — This sets the bridge priority for VLAN 10 to 4096, making the switch more likely to become the root bridge for that VLAN.
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.
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