The answer is that vMotion will fail with an error. This occurs because vMotion relies on a dedicated, lossless network connection to transfer the memory state of a running virtual machine; any packet drops corrupt the data stream, causing the migration process to abort immediately. On the VMware Certified Professional Data Center Virtualization VCP-DCV exam, this question tests your understanding of vMotion network requirements and the importance of redundancy—a common trap is assuming vMotion can tolerate minor packet loss or that it will simply retry, but without an alternate network configured, the operation cannot recover. Remember that vMotion is designed for zero downtime, so even intermittent drops break the integrity of the memory copy. A useful memory tip: think of vMotion as a live phone call—if the line crackles (packet loss), the call drops unless you have a backup line (alternate network).
VCP-DCV vSphere Architecture, Products and Solutions Practice Question
This VCP-DCV practice question tests your understanding of vsphere architecture, products and solutions. 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.
A company has a vSphere environment with multiple clusters. The network team reports that a specific VLAN used for vMotion is intermittently dropping packets. What is the impact on vMotion operations?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
vMotion will fail with an error.
If the dedicated vMotion network drops packets, vMotion will fail unless an alternate network is configured.
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.
✗
vMotion will use the management network as fallback.
Why it's wrong here
Incorrect: Management network is not used for vMotion.
✓
vMotion will fail with an error.
Why this is correct
Correct: Packet loss causes vMotion failure.
Related concept
Access ports place end devices into a single VLAN.
✗
vMotion will work but at a reduced speed.
Why it's wrong here
Incorrect: vMotion requires reliable network.
✗
vMotion will automatically switch to another available network.
Why it's wrong here
Incorrect: Automatic fallback only if multiple vMotion networks are 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.
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 VCP-DCV questions on switching, trunking, and access-port configuration.
vSphere Architecture, Products and Solutions — This question tests vSphere Architecture, Products and Solutions — Access ports place end devices into a single VLAN..
What is the correct answer to this question?
The correct answer is: vMotion will fail with an error. — If the dedicated vMotion network drops packets, vMotion will fail unless an alternate network is configured.
What should I do if I get this VCP-DCV 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 VCP-DCV 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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Question Discussion
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