- A
Name the VPC, Select custom subnet mode, Define subnets, Create VPC
This is the correct order because in Google Cloud, when creating a VPC with custom subnet mode, you first name the VPC, then choose the custom mode, then define the subnets manually, and finally create the VPC.
- B
Name the VPC, Define subnets, Select custom subnet mode, Create VPC
Why wrong: This is incorrect because you must select the custom subnet mode before defining subnets, as the mode determines that subnets are created manually.
- C
Select custom subnet mode, Name the VPC, Define subnets, Create VPC
Why wrong: This is incorrect because naming the VPC typically comes before selecting the subnet mode in the creation workflow.
- D
Define subnets, Name the VPC, Select custom subnet mode, Create VPC
Why wrong: This is incorrect because you cannot define subnets before naming the VPC and selecting the custom mode, as the subnet configuration is part of the VPC creation process.
How to Create a Custom Subnet Mode VPC
This PCNE practice question tests your understanding of pcne exam topics. 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 create a VPC with custom subnet mode 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
Name the VPC, Select custom subnet mode, Define subnets, Create VPC
Custom subnet mode requires manual subnet creation. The steps include naming the VPC, selecting custom mode, and defining 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.
- ✓
Name the VPC, Select custom subnet mode, Define subnets, Create VPC
Why this is correct
This is the correct order because in Google Cloud, when creating a VPC with custom subnet mode, you first name the VPC, then choose the custom mode, then define the subnets manually, and finally create the VPC.
Related concept
CIDR notation defines the prefix length.
- ✗
Name the VPC, Define subnets, Select custom subnet mode, Create VPC
Why it's wrong here
This is incorrect because you must select the custom subnet mode before defining subnets, as the mode determines that subnets are created manually.
- ✗
Select custom subnet mode, Name the VPC, Define subnets, Create VPC
Why it's wrong here
This is incorrect because naming the VPC typically comes before selecting the subnet mode in the creation workflow.
- ✗
Define subnets, Name the VPC, Select custom subnet mode, Create VPC
Why it's wrong here
This is incorrect because you cannot define subnets before naming the VPC and selecting the custom mode, as the subnet configuration is part of the VPC creation process.
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 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.
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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FAQ
Questions learners often ask
What does this PCNE question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: Name the VPC, Select custom subnet mode, Define subnets, Create VPC — Custom subnet mode requires manual subnet creation. The steps include naming the VPC, selecting custom mode, and defining 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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