PCNE Implementing VPC Instances Practice Question
A Compute Engine instance has multiple network interfaces. Which interface is considered the primary (NIC0)?
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
✓
The interface with the lowest index number (nic0).
By default, the first interface attached (nic0) is the primary interface and used for default routes and internal DNS.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The interface with the lowest index number (nic0).
Why this is correct
nic0 is the primary interface.
- ✗
The interface configured first in the instance creation.
Why it's wrong here
That is nic0.
- ✗
The interface with the highest index number.
Why it's wrong here
Highest index is not primary.
- ✗
All interfaces are primary.
Why it's wrong here
Only nic0 is primary.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNE practice question is part of Courseiva's free Google Cloud 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 PCNE exam.