- A
Create host project and enable Shared VPC, attach service projects to host project, grant IAM permissions to service project admins, service project admins create resources using shared subnets.
This is the correct order because Shared VPC must be enabled on the host project first, then service projects are attached, followed by IAM grants to allow service project admins to use the shared subnets, after which they can create resources.
- B
Grant IAM permissions to service project admins, create host project and enable Shared VPC, attach service projects to host project, service project admins create resources.
Why wrong: This is incorrect because IAM permissions cannot be granted before the host project and service projects are set up; the host project must exist first.
- C
Attach service projects to host project, create host project and enable Shared VPC, grant IAM permissions, service project admins create resources.
Why wrong: This is incorrect because the host project must be created and Shared VPC enabled before service projects can be attached.
- D
Create service projects first, then create host project and enable Shared VPC, attach service projects, grant IAM permissions.
Why wrong: This is incorrect because service projects are created independently but must be attached to a host project that already exists and has Shared VPC enabled; creating them first does not affect order but the host project setup must precede attachment.
Shared VPC Setup Steps — Correct Order for Host and Service Projects | Google Professional Cloud Network Engineer Explained
This PCNE practice question tests your understanding of implementing network security. 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.
Drag and drop the steps to set up a shared VPC in Google Cloud into the correct order.
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
Create host project and enable Shared VPC, attach service projects to host project, grant IAM permissions to service project admins, service project admins create resources using shared subnets.
Shared VPC requires a host project with VPC, then granting access to service projects. Service projects then use the shared subnets.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Create host project and enable Shared VPC, attach service projects to host project, grant IAM permissions to service project admins, service project admins create resources using shared subnets.
Why this is correct
This is the correct order because Shared VPC must be enabled on the host project first, then service projects are attached, followed by IAM grants to allow service project admins to use the shared subnets, after which they can create resources.
Related concept
CIDR notation defines the prefix length.
- ✗
Grant IAM permissions to service project admins, create host project and enable Shared VPC, attach service projects to host project, service project admins create resources.
Why it's wrong here
This is incorrect because IAM permissions cannot be granted before the host project and service projects are set up; the host project must exist first.
- ✗
Attach service projects to host project, create host project and enable Shared VPC, grant IAM permissions, service project admins create resources.
Why it's wrong here
This is incorrect because the host project must be created and Shared VPC enabled before service projects can be attached.
- ✗
Create service projects first, then create host project and enable Shared VPC, attach service projects, grant IAM permissions.
Why it's wrong here
This is incorrect because service projects are created independently but must be attached to a host project that already exists and has Shared VPC enabled; creating them first does not affect order but the host project setup must precede attachment.
Common exam traps
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.
Detailed technical explanation
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.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related PCNE subnetting questions on CIDR, address ranges, and subnet selection.
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Implementing network security — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this PCNE question test?
Implementing network security — This question tests Implementing network security — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Create host project and enable Shared VPC, attach service projects to host project, grant IAM permissions to service project admins, service project admins create resources using shared subnets. — Shared VPC requires a host project with VPC, then granting access to service projects. Service projects then use the shared subnets.
What should I do if I get this PCNE 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 PCNE subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Last reviewed: Jun 11, 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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