- A
Conflict between the two VPCs (10.1.0.0/16 and 10.2.0.0/16)
Why wrong: 10.1.0.0/16 and 10.2.0.0/16 are non-overlapping.
- B
Conflict between VPC1 (10.1.0.0/16) and on-premises (10.0.0.0/8)
Why wrong: While true, the more comprehensive answer is conflict with both VPCs.
- C
No conflict; all ranges are non-overlapping
Why wrong: 10.0.0.0/8 includes 10.1.0.0/16 and 10.2.0.0/16, causing overlap.
- D
Conflict between on-premises (10.0.0.0/8) and both VPCs
10.0.0.0/8 encompasses both 10.1.0.0/16 and 10.2.0.0/16, causing overlap.
Question 308 of 1,000
PCNE Practice Question: Designing, Planning, and Prototyping a GCP Network
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 engineer is planning IP address ranges for two VPCs that will be connected via VPC peering. One VPC uses 10.1.0.0/16 and the other uses 10.2.0.0/16. They also plan to use HA VPN to an on-premises network using 10.0.0.0/8. Which IP range assignment could cause a conflict?
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
✓
Conflict between on-premises (10.0.0.0/8) and both VPCs
The on-premises range 10.0.0.0/8 overlaps with both VPC ranges; VPC peering and VPN both require non-overlapping ranges.
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.
- ✗
Conflict between the two VPCs (10.1.0.0/16 and 10.2.0.0/16)
Why it's wrong here
10.1.0.0/16 and 10.2.0.0/16 are non-overlapping.
- ✗
Conflict between VPC1 (10.1.0.0/16) and on-premises (10.0.0.0/8)
Why it's wrong here
While true, the more comprehensive answer is conflict with both VPCs.
- ✗
No conflict; all ranges are non-overlapping
Why it's wrong here
10.0.0.0/8 includes 10.1.0.0/16 and 10.2.0.0/16, causing overlap.
- ✓
Conflict between on-premises (10.0.0.0/8) and both VPCs
Why this is correct
10.0.0.0/8 encompasses both 10.1.0.0/16 and 10.2.0.0/16, causing overlap.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
Identify which PCNE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Designing, Planning, and Prototyping a GCP Network — study guide chapter
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FAQ
Questions learners often ask
What does this PCNE question test?
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..
What is the correct answer to this question?
The correct answer is: Conflict between on-premises (10.0.0.0/8) and both VPCs — The on-premises range 10.0.0.0/8 overlaps with both VPC ranges; VPC peering and VPN both require non-overlapping ranges.
What should I do if I get this PCNE question wrong?
Identify which PCNE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jul 4, 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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