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Trust and security with Google Cloud →mediumDrag & DropObjective-mapped

Cloud Digital Leader Trust and security with Google Cloud Practice Question

This GCDL practice question tests your understanding of trust and security with google cloud. 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 Cloud NAT for private Compute Engine instances to access the internet in the correct order.

A
Create a VPC network with a subnet, then create a Cloud Router in that network, then create a Cloud NAT gateway on that router and subnet, then configure firewall rules to allow egress traffic, then verify connectivity from private instances.
This is the correct order because Cloud NAT requires a VPC network and a Cloud Router to function. Firewall rules must allow egress traffic, and verification ensures the setup works.
B
Create a Cloud NAT gateway first, then create a Cloud Router, then create a VPC network, then configure firewall rules, then verify connectivity.
Why wrong: This is incorrect because Cloud NAT cannot be created without an existing Cloud Router and VPC network. The NAT gateway depends on the router, and the router depends on the VPC.
C
Create firewall rules first, then create a VPC network, then create a Cloud Router, then create a Cloud NAT gateway, then verify connectivity.
Why wrong: This is incorrect because firewall rules are scoped to a VPC network, so the VPC must exist before creating firewall rules. Additionally, the NAT gateway should be created after the router.
D
Create a VPC network, then configure firewall rules, then create a Cloud NAT gateway, then create a Cloud Router, then verify connectivity.
Why wrong: This is incorrect because the Cloud NAT gateway requires a Cloud Router to be created first. Configuring firewall rules before creating the NAT is acceptable but the router order is wrong.

Full breakdown with real-world context →

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 a VPC network with a subnet, then create a Cloud Router in that network, then create a Cloud NAT gateway on that router and subnet, then configure firewall rules to allow egress traffic, then verify connectivity from private instances.

The setup requires a VPC, Cloud Router, NAT gateway, appropriate firewall rules, and verification.

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 a VPC network with a subnet, then create a Cloud Router in that network, then create a Cloud NAT gateway on that router and subnet, then configure firewall rules to allow egress traffic, then verify connectivity from private instances.
Why this is correct
This is the correct order because Cloud NAT requires a VPC network and a Cloud Router to function. Firewall rules must allow egress traffic, and verification ensures the setup works.
Related concept
CIDR notation defines the prefix length.
✗
Create a Cloud NAT gateway first, then create a Cloud Router, then create a VPC network, then configure firewall rules, then verify connectivity.
Why it's wrong here
This is incorrect because Cloud NAT cannot be created without an existing Cloud Router and VPC network. The NAT gateway depends on the router, and the router depends on the VPC.
✗
Create firewall rules first, then create a VPC network, then create a Cloud Router, then create a Cloud NAT gateway, then verify connectivity.
Why it's wrong here
This is incorrect because firewall rules are scoped to a VPC network, so the VPC must exist before creating firewall rules. Additionally, the NAT gateway should be created after the router.
✗
Create a VPC network, then configure firewall rules, then create a Cloud NAT gateway, then create a Cloud Router, then verify connectivity.
Why it's wrong here
This is incorrect because the Cloud NAT gateway requires a Cloud Router to be created first. Configuring firewall rules before creating the NAT is acceptable but the router order is wrong.

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 GCDL subnetting questions on CIDR, address ranges, and subnet selection.

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FAQ

Questions learners often ask

What does this GCDL question test?

Trust and security with Google Cloud — This question tests Trust and security with Google Cloud — CIDR notation defines the prefix length..

What is the correct answer to this question?

The correct answer is: Create a VPC network with a subnet, then create a Cloud Router in that network, then create a Cloud NAT gateway on that router and subnet, then configure firewall rules to allow egress traffic, then verify connectivity from private instances. — The setup requires a VPC, Cloud Router, NAT gateway, appropriate firewall rules, and verification.

What should I do if I get this GCDL question wrong?

What is the key concept behind this question?

CIDR notation defines the prefix length.

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