VCP-DCV Configure and Manage vSphere Networking Practice Question
An administrator configures a Private VLAN on a distributed switch with primary VLAN 100 and secondary VLANs 101 (isolated) and 102 (community). A VM on isolated secondary VLAN 101 needs to communicate with a VM on community secondary VLAN 102. What additional configuration is required?
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
✓
Deploy a VM on the primary VLAN 100 with routing capabilities to forward traffic between the secondary VLANs.
In a Private VLAN configuration, isolated secondary VLANs can only communicate with promiscuous ports on the primary VLAN. A VM deployed on the primary VLAN with routing capabilities acts as a promiscuous port and can forward traffic between the isolated (101) and community (102) secondary VLANs. Option A is incorrect because enabling promiscuous mode on the isolated port group does not allow communication to community VLANs and breaks isolation. Option B is not the standard VMware recommended approach; the typical method is to use a VM on the primary VLAN. Option C is incorrect because communication is possible through a promiscuous port on the primary VLAN.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable promiscuous mode on the port group for VLAN 101.
Why it's wrong here
Promiscuous mode allows receiving all packets, but does not enable transmission between isolated and community.
- ✗
Configure a proxy router on the physical network.
Why it's wrong here
While possible, it is not the most direct vSphere configuration.
- ✗
They cannot communicate because isolated PVLANs prohibit any communication to other secondary VLANs.
Why it's wrong here
They can communicate via a promiscuous port.
- ✓
Deploy a VM on the primary VLAN 100 with routing capabilities to forward traffic between the secondary VLANs.
Why this is correct
A promiscuous port (primary VLAN) can communicate with both isolated and community, enabling routing.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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