VCP-VVF Troubleshoot And Optimize Practice Question
An administrator is troubleshooting a virtual machine network connectivity failure where packets are dropped between two VMs residing on the same ESXi host connected to a standard virtual switch. Which configuration setting on the virtual switch port group could block direct internal traffic between VMs on the same host?
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
✓
Misconfigured Security policies (Promiscuous Mode, MAC Address Changes, Forged Transmits) or Private VLAN (PVLAN) isolations on the switch.
Setting 'Promiscuous Mode', 'MAC Address Changes', or 'Forged Transmits' incorrectly can restrict traffic, but specifically, port security settings or blocked ports can isolate traffic. However, standard virtual switches forward traffic locally unless blocked by security policies or isolated private VLANs (PVLANs) on vDS.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enabling Storage I/O Control on the switch uplinks.
Why it's wrong here
SIOC is a storage optimization feature, unrelated to virtual switch networking.
- ✓
Misconfigured Security policies (Promiscuous Mode, MAC Address Changes, Forged Transmits) or Private VLAN (PVLAN) isolations on the switch.
Why this is correct
Security policies or PVLAN settings can drop frames between ports if traffic violates the defined security or isolation rules.
- ✗
Setting the VMkernel MTU to 1500 bytes.
Why it's wrong here
Standard MTU of 1500 bytes is standard and does not block internal local communication.
- ✗
Disabling Enhanced vMotion Compatibility (EVC) on the virtual switch.
Why it's wrong here
EVC applies to CPU features across cluster hosts, not virtual switch packet forwarding.
Visual reference
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
About these practice questions
One of 517 original VCP-VVF practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official VMware exam blueprint
This VCP-VVF practice question is part of Courseiva's free VMware 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 VCP-VVF exam.