PCNE Configuring Network Services Practice Question
Which THREE of the following are requirements for VPC Network Peering?
⚠ Common exam trap
Google Cloud often tests the misconception that VPC Network Peering supports transitive routing, but the correct behavior is that peering is non-transitive and each pair must be explicitly configured.
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 VPCs must have non-overlapping subnet IP ranges.
VPC Network Peering requires non-overlapping subnet IP ranges to prevent routing conflicts and ensure that traffic is correctly directed between the peered VPCs. Overlapping CIDR blocks would cause ambiguous routing, as the same IP address could exist in both VPCs, making it impossible for the VPC routers to determine the correct destination.
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 VPCs must have non-overlapping subnet IP ranges.
Why this is correct
Overlapping IP ranges cannot be peered due to routing conflicts.
- ✗
Peering supports transitive routing.
Why it's wrong here
VPC peering is non-transitive; you cannot route through a peered VPC to another.
- ✓
Routes are automatically exchanged.
Why this is correct
Peering causes automatic exchange of subnet routes between the VPCs.
- ✓
You need IAM permissions to establish the peering.
Why this is correct
The user must have compute.networks.updatePeering permission on both VPCs.
- ✗
The VPCs must be in the same project.
Why it's wrong here
VPC peering can be across different projects and organizations.
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JA
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.