The answer is to configure NIC teaming within the guest operating system. This is correct because when a virtual machine has two vNICs connected to separate standard port groups on different VLANs, the vSwitch itself cannot team those interfaces—it treats each port group as an independent logical switch. For load balancing with multiple vNICs in guest OS, the operating system must manage the teaming itself, combining the two adapters into a single logical interface for both load balancing and failover. On the VMware Certified Professional Data Center Virtualization VCP-DCV exam, this scenario tests your understanding that vSwitch-based teaming policies apply only within a single port group, not across port groups. A common trap is assuming IP hash or other vSwitch load balancing methods can span VLANs, but they cannot. Remember the memory tip: separate port groups mean separate switches—team only inside the guest.
VCP-DCV Configure and Manage vSphere Networking Practice Question
This VCP-DCV practice question tests your understanding of configure and manage vsphere networking. 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 virtual machine is configured with two vNICs connected to different standard port groups (VLAN 10 and VLAN 20). The administrator wants to use both vNICs for load balancing and failover within the VM OS. Which condition must be met on the vSwitch side?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure NIC teaming within the guest operating system.
Option C is correct because the VM OS must have NIC teaming configured to use both interfaces. The vSwitch port groups are separate, so they don't team at the virtual switch level. Option A is incorrect because teaming at vSwitch is per port group, not across port groups. Option B is incorrect because MAC address changes are not needed. Option D is incorrect because route based on IP hash is for a single port group.
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.
Configure teaming on the standard switch by bridging the two port groups.
Why it's wrong here
Standard switches do not bridge port groups; each port group is isolated.
✓
Configure NIC teaming within the guest operating system.
Why this is correct
Since the vNICs are on separate port groups, the VM OS must handle load balancing and failover via software teaming (e.g., bond).
Related concept
Access ports place end devices into a single VLAN.
✗
Set load balancing to 'Route based on IP hash' on both port groups.
Why it's wrong here
IP hash works within a single port group teaming multiple uplinks; it does not combine two separate port groups.
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.
Configure and Manage vSphere Networking — This question tests Configure and Manage vSphere Networking — Access ports place end devices into a single VLAN..
What is the correct answer to this question?
The correct answer is: Configure NIC teaming within the guest operating system. — Option C is correct because the VM OS must have NIC teaming configured to use both interfaces. The vSwitch port groups are separate, so they don't team at the virtual switch level. Option A is incorrect because teaming at vSwitch is per port group, not across port groups. Option B is incorrect because MAC address changes are not needed. Option D is incorrect because route based on IP hash is for a single port group.
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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