- A
HA VPN Gateway
Why wrong: HA VPN Gateway is a component of Cloud VPN; alone it does not provide connectivity without tunnels configured.
- B
VPC Network Peering
Correct: Cross-region and cross-project VPC peering is supported, using private IPs with high throughput.
- C
Cloud NAT
Why wrong: Cloud NAT provides outbound internet access for private instances, not connectivity between VPCs.
- D
Cloud VPN (HA VPN Classic)
Correct: HA VPN can connect VPCs in different regions/projects over the internet with private IPs via tunnels.
- E
Shared VPC
Why wrong: Shared VPC allows a common VPC network to be shared across projects, but it does not connect separate VPC networks.
Question 288 of 1,000
Google PCA Manage and provision cloud infrastructure Practice Question
This PCA practice question tests your understanding of manage and provision cloud infrastructure. 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.
A company needs to connect two VPC networks in different Google Cloud regions. The VPCs are in separate projects under the same organization. The connection must use private IP addresses and support high throughput. Which TWO options meet these requirements? (Choose 2.)
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
✓
VPC Network Peering
VPC Network Peering allows direct private IP connectivity between two VPCs in different projects and regions, using RFC 1918 addresses without internet gateways or VPNs. It supports high throughput because traffic stays within Google's network backbone and does not rely on encrypted tunnels that can introduce overhead.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
HA VPN Gateway
- ✓
VPC Network Peering
Why this is correct
Correct: Cross-region and cross-project VPC peering is supported, using private IPs with high throughput.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Cloud NAT
Why it's wrong here
Cloud NAT provides outbound internet access for private instances, not connectivity between VPCs.
- ✓
Cloud VPN (HA VPN Classic)
- ✗
Shared VPC
Why it's wrong here
Shared VPC allows a common VPC network to be shared across projects, but it does not connect separate VPC networks.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Shared VPC with VPC Network Peering, not realizing Shared VPC merges projects into one VPC rather than connecting two independent VPCs.
Detailed technical explanation
How to think about this question
VPC Network Peering uses Google's internal infrastructure to exchange routes between VPCs, enabling subnets to communicate directly without any VPN or gateway. Under the hood, peering is implemented as a distributed routing table exchange that supports up to 10 Gbps per peering link, and it does not incur egress costs for traffic within the same region (though inter-region egress charges apply). A real-world scenario is connecting a production VPC in us-central1 with a disaster recovery VPC in europe-west1 for database replication, where peering provides low-latency private connectivity without VPN overhead.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this PCA question test?
Manage and provision cloud infrastructure — This question tests Manage and provision cloud infrastructure — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: VPC Network Peering — VPC Network Peering allows direct private IP connectivity between two VPCs in different projects and regions, using RFC 1918 addresses without internet gateways or VPNs. It supports high throughput because traffic stays within Google's network backbone and does not rely on encrypted tunnels that can introduce overhead.
What should I do if I get this PCA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 2026
This PCA 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 PCA exam.
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