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ACE Practice Question: Planning a GCP network for a company with offices…
This ACE practice question tests your understanding of planning a gcp network for a company with offices…. 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.
You are planning a GCP network for a company with offices in three regions: `us-central1`, `europe-west1`, and `asia-east1`. All three regions must communicate with each other, and traffic must NOT traverse the public internet. Each region has its own subnet. Which network design achieves this with the least management overhead?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
Use a single global VPC with subnets in each region; traffic between subnets stays on Google's private network.
A single GCP VPC is global by design. Subnets in different regions communicate over Google's internal backbone — no special configuration required for private inter-region connectivity.
B
Distractor review
Set up Cloud VPN tunnels between each pair of regions.
Cloud VPN is used to connect external (on-premises or other cloud) networks to GCP, not for connectivity within a single GCP VPC.
C
Distractor review
Create three separate VPCs (one per region) and connect them with VPC Network Peering.
Separate VPCs with peering adds administrative overhead (peer each pair, manage peering routes) when a single global VPC achieves the same result automatically.
D
Distractor review
Use Cloud Interconnect dedicated connections in each region and configure BGP routing between them.
Cloud Interconnect is for on-premises to GCP connectivity, not for inter-region routing within a GCP VPC.
Common exam trap
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Technical deep dive
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Related practice questions
Related ACE practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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Question 4
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Question 5
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Question 6
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FAQ
Questions learners often ask
What does this ACE question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: Use a single global VPC with subnets in each region; traffic between subnets stays on Google's private network. — A single VPC network in GCP spans all regions globally. Subnets in different regions within the same VPC can communicate with each other over Google's private backbone without traversing the public internet. This is the default behavior — inter-region communication uses Google's private network infrastructure. No additional VPC peering, VPN, or Interconnect configuration is needed for inter-region private connectivity within a single VPC.
What should I do if I get this ACE question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related ACE subnetting questions on CIDR, address ranges, and subnet selection.
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This ACE 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 ACE exam.