This PCNE practice question tests your understanding of designing, planning, and prototyping a gcp network. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An organization has two VPC networks in different Google Cloud organizations. They need to allow private IP communication between instances in these VPCs without using public IPs or VPNs. Which solution should they use?
Cloud NAT
Why wrong: Provides outbound internet access, not private communication.
Shared VPC
Why wrong: Only works within the same organization.
Cloud VPN
Why wrong: Uses public IPs or encryption, not pure private IP.
VPC Network Peering
Supports cross-organization peering.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
VPC Network Peering
VPC Network Peering allows private IP connectivity between two VPC networks across different organizations without requiring public IPs, VPNs, or gateways. It uses the Google Cloud internal infrastructure to route traffic directly between instances, leveraging RFC 1918 addresses and supporting global peering.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Cloud NAT
Why it's wrong here
Provides outbound internet access, not private communication.
Shared VPC
Why it's wrong here
Only works within the same organization.
Cloud VPN
Why it's wrong here
Uses public IPs or encryption, not pure private IP.
VPC Network Peering
Why this is correct
Supports cross-organization peering.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Google Cloud often tests the distinction between Shared VPC (same org) and VPC Network Peering (cross-org), leading candidates to mistakenly choose Shared VPC when the question specifies different organizations.
Detailed technical explanation
VPC Network Peering uses the Google Cloud backbone to exchange routes between VPCs, enabling direct private IP communication with low latency and high throughput. It supports up to 25 peering connections per VPC and does not require any virtual appliance or gateway, making it ideal for multi-organization scenarios. A real-world example is connecting a SaaS provider's VPC in one org with a customer's VPC in another org for private database access.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Designing, planning, and prototyping a GCP network — This question tests Designing, planning, and prototyping a GCP network — Read the scenario before looking for a memorised answer..
The correct answer is: VPC Network Peering — VPC Network Peering allows private IP connectivity between two VPC networks across different organizations without requiring public IPs, VPNs, or gateways. It uses the Google Cloud internal infrastructure to route traffic directly between instances, leveraging RFC 1918 addresses and supporting global peering.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
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.
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