- A
Set up Cloud NAT to provide outbound internet access for the instances.
Why wrong: Cloud NAT is for outbound traffic, not inbound security.
- B
Configure VPC firewall rules on the subnet to allow only the IP ranges.
Why wrong: Cloud Armor operates at the load balancer; VPC firewall rules at the instance level are redundant.
- C
Enable predefined WAF rules (e.g., OWASP Top 10) in the Cloud Armor security policy.
WAF rules block common web attacks like SQL injection and XSS.
- D
Create a Cloud Armor security policy with an allow rule for the IP ranges and a default deny rule for all other traffic.
This restricts inbound traffic to the specified IP ranges at the load balancer.
- E
Enable Cloud CDN to cache static content from the backend.
Why wrong: Cloud CDN improves content delivery but does not restrict traffic or block attacks.
Google ACE Cloud Armor security policy Practice Question
This ACE practice question tests your understanding of cloud armor security policy. 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. A key principle to apply: cloud Armor security policy. 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 uses Cloud Armor to protect an HTTP Load Balancer. They want to allow traffic only from specific IP ranges (198.51.100.0/24 and 203.0.113.0/24) and block common web attacks like SQL injection and XSS. Which TWO actions should they take?
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
Enable predefined WAF rules (e.g., OWASP Top 10) in the Cloud Armor security policy.
Cloud Armor is used to protect HTTP(S) load balancers. To allow only specific IP ranges, create a security policy with an allow rule for those IPs and a default deny rule (option C). To block SQL injection and XSS, enable predefined WAF rules like the OWASP Top 10 (option D). Option A (Cloud NAT) provides outbound internet access, not inbound security. Option B (VPC firewall rules) operates at the instance level, not at the load balancer, and would not block web attacks. Option E (Cloud CDN) improves performance but does not affect security policies.
Key principle: Cloud Armor security policy
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Set up Cloud NAT to provide outbound internet access for the instances.
Why it's wrong here
Cloud NAT is for outbound traffic, not inbound security.
- ✗
Configure VPC firewall rules on the subnet to allow only the IP ranges.
Why it's wrong here
Cloud Armor operates at the load balancer; VPC firewall rules at the instance level are redundant.
- ✓
Enable predefined WAF rules (e.g., OWASP Top 10) in the Cloud Armor security policy.
Why this is correct
WAF rules block common web attacks like SQL injection and XSS.
Related concept
Cloud Armor security policy
- ✓
Create a Cloud Armor security policy with an allow rule for the IP ranges and a default deny rule for all other traffic.
Why this is correct
This restricts inbound traffic to the specified IP ranges at the load balancer.
Related concept
Cloud Armor security policy
- ✗
Enable Cloud CDN to cache static content from the backend.
Why it's wrong here
Cloud CDN improves content delivery but does not restrict traffic or block attacks.
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
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Cloud Armor security policy
- WAF rules
- IP allowlisting
- Default deny rule
TExam Day Tips
- 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
Cloud Armor security policy
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 cloud Armor security policy, then practise related ACE questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this ACE question test?
Cloud Armor security policy
What is the correct answer to this question?
The correct answer is: Enable predefined WAF rules (e.g., OWASP Top 10) in the Cloud Armor security policy. — Cloud Armor is used to protect HTTP(S) load balancers. To allow only specific IP ranges, create a security policy with an allow rule for those IPs and a default deny rule (option C). To block SQL injection and XSS, enable predefined WAF rules like the OWASP Top 10 (option D). Option A (Cloud NAT) provides outbound internet access, not inbound security. Option B (VPC firewall rules) operates at the instance level, not at the load balancer, and would not block web attacks. Option E (Cloud CDN) improves performance but does not affect security policies.
What should I do if I get this ACE question wrong?
Review cloud Armor security policy, then practise related ACE questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Cloud Armor security policy
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Last reviewed: Jun 23, 2026
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