VCP-DCV vSphere Performance and Scaling Practice Question
Exhibit
Refer to the exhibit. ``` # dvs_port_statistics (partial) Port ID: 1234 Packets Received: 15000000 Packets Transmitted: 10000000 Dropped Rx: 150 Dropped Tx: 10 Rx CRC Errors: 10 ```
Refer to the exhibit. A distributed virtual switch port shows dropped Rx packets and CRC errors. What is the most likely cause?
⚠ Common exam trap
Test-takers frequently confuse CRC errors (Layer 1 physical corruption) with MTU mismatch or VLAN misconfiguration (Layer 2/3 issues), leading them to select options that address logical configuration rather than physical cabling faults.
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
✓
Faulty physical network cable or NIC.
CRC errors and dropped Rx packets on a distributed virtual switch port indicate physical-layer corruption of frames, typically caused by a faulty cable, damaged NIC, or bad transceiver. These errors occur when the cyclic redundancy check (CRC) computed by the receiver does not match the frame's CRC field, which is a direct symptom of signal integrity issues at Layer 1.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Faulty physical network cable or NIC.
Why this is correct
CRC errors are often due to bad cabling.
- ✗
Outdated NIC driver on the ESXi host.
Why it's wrong here
Driver issues could cause drops but CRC errors point to physical layer.
- ✗
MTU mismatch between the switch and the VM.
Why it's wrong here
MTU mismatch causes dropped packets but not CRC errors.
- ✗
Incorrect VLAN configuration on the port group.
Why it's wrong here
VLAN issues do not cause CRC errors.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This VCP-DCV 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-DCV exam.