- A
Configure Shared VPC to isolate network traffic
Why wrong: Shared VPC is for sharing networks across projects, not for restricting traffic.
- B
Delete the default allow rules that allow all traffic
Why wrong: Default rules allow only internal traffic; deleting them might break connectivity.
- C
Use Cloud NAT to allow inbound traffic from the internet
Why wrong: Cloud NAT is for outbound only.
- D
Use service accounts to restrict traffic between instances
Service accounts can be used in firewall rules to allow traffic based on identity.
- E
Create ingress firewall rules that allow traffic from specific source IP ranges and apply them using network tags
Tags allow selective application of rules to VMs.
Question 833 of 1,000
Google ACE Planning and Configuring a Cloud Solution Practice Question
This ACE practice question tests your understanding of planning and configuring a cloud solution. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A company is deploying a multi-region application on Compute Engine and needs to configure network security. Which two steps should they take to restrict access to only required traffic? (Choose 2)
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
✓
Use service accounts to restrict traffic between instances
Firewall rules by default deny all ingress; you need to allow specific traffic by source IP or service account. Tags help apply rules to specific VMs. Shared VPC is for cross-project networking. Cloud NAT is for outbound internet. Using default allow rules would be too permissive.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure Shared VPC to isolate network traffic
Why it's wrong here
Shared VPC is for sharing networks across projects, not for restricting traffic.
- ✗
Delete the default allow rules that allow all traffic
Why it's wrong here
Default rules allow only internal traffic; deleting them might break connectivity.
- ✗
Use Cloud NAT to allow inbound traffic from the internet
Why it's wrong here
Cloud NAT is for outbound only.
- ✓
Use service accounts to restrict traffic between instances
- ✓
Create ingress firewall rules that allow traffic from specific source IP ranges and apply them using network tags
Why this is correct
Tags allow selective application of rules to VMs.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ACE NAT questions on configuration and troubleshooting.
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Planning and Configuring a Cloud Solution — study guide chapter
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FAQ
Questions learners often ask
What does this ACE question test?
Planning and Configuring a Cloud Solution — This question tests Planning and Configuring a Cloud Solution — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use service accounts to restrict traffic between instances — Firewall rules by default deny all ingress; you need to allow specific traffic by source IP or service account. Tags help apply rules to specific VMs. Shared VPC is for cross-project networking. Cloud NAT is for outbound internet. Using default allow rules would be too permissive.
What should I do if I get this ACE question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ACE NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jul 4, 2026
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.
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