PCNE Practice Question: Designing, Planning, and Prototyping a GCP Network
Which TWO of the following are benefits of using Shared VPC?
⚠ Common exam trap
Google Cloud often tests the misconception that Shared VPC inherently provides security features like VPC Service Perimeters, when in fact those are separate controls; the trap here is confusing the administrative separation of network and application teams as a direct benefit of Shared VPC, rather than recognizing that the core technical benefit is automatic cross-project routing and centralized firewall rule management.
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
✓
Automatic cross-project routing
Shared VPC allows an organization to connect resources from multiple projects to a common VPC network, enabling automatic cross-project routing. This is because all subnets in the host project are directly reachable from any service project attached to that host, without needing additional VPC peering or VPN tunnels. Option B is correct because this inherent routing simplifies network connectivity and reduces administrative overhead.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enhanced security through VPC Service Perimeters
Why it's wrong here
Service Perimeters are an independent feature, not part of Shared VPC.
- ✓
Automatic cross-project routing
Why this is correct
Service project VMs automatically communicate using host project's routes.
- ✓
Centralized firewall rule management
Why this is correct
Firewall rules are defined in the host project and apply to all service projects.
- ✗
Reduced IP address usage
Why it's wrong here
IP address usage is not reduced; subnets are still allocated.
- ✗
Separation of network and application teams
Why it's wrong here
Shared VPC does not enforce team separation; it can be structured that way but not a benefit per se.
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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.