The answer is to attach the Cloud Armor policy to the backend service of the global HTTP Load Balancer. This is correct because Cloud Armor policies operate at the edge of Google’s network, filtering traffic based on rules like geographic location before requests ever reach your backend instances; attaching the policy to the backend service—rather than to the load balancer frontend or VPC firewall—ensures that country-based blocking is enforced at the correct layer for data sovereignty compliance. On the Google Professional Cloud Security Engineer exam, this tests your understanding of Cloud Armor’s integration with load balancing components, and a common trap is assuming the policy attaches to the load balancer’s frontend IP or target proxy. Remember: backend services are the attachment point for security policies, while frontends handle SSL and routing. A useful memory tip is “Backend for blocking, frontend for forwarding.”
PCSE Supporting compliance requirements Practice Question
This PCSE practice question tests your understanding of supporting compliance requirements. 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 wants to use Cloud Armor to block traffic from specific countries to comply with data sovereignty requirements. They have a global HTTP Load Balancer configured. Where should they configure the Cloud Armor policy?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Attach to the backend service of the load balancer.
Cloud Armor policies must be attached to a backend service (or backend bucket) of a global HTTP(S) Load Balancer to filter traffic at the edge. This allows the policy to evaluate incoming requests based on geographic location before they reach the backend, enforcing data sovereignty rules without modifying VPC networking or firewall rules.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Attach to the VPC network that hosts the load balancer.
Why it's wrong here
Cloud Armor policies are not attached to VPC networks.
✓
Attach to the backend service of the load balancer.
Why this is correct
Cloud Armor policies are applied to backend services.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure as an Organization Policy constraint.
Why it's wrong here
Organization Policy constraints do not control traffic at the network level.
✗
Configure as a firewall rule in the VPC network.
Why it's wrong here
Firewall rules do not support geographic blocking.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that Cloud Armor is a VPC-level firewall feature, leading candidates to choose VPC firewall rules or network-level attachments, when in fact it is a load balancer backend service security policy that operates at the application layer on Google's global edge.
Detailed technical explanation
How to think about this question
Cloud Armor uses Google's global anycast edge points of presence (PoPs) to evaluate WAF rules and geo-based access controls before traffic reaches the load balancer. The policy is evaluated against the client IP's geolocation derived from Google's IP mapping database, which is more granular than simple IP ranges. In a real-world scenario, attaching the policy to the backend service ensures that only traffic matching the allowed countries reaches the backend, while all other requests are rejected with a 403 response at the edge, reducing load on origin servers.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Supporting compliance requirements — This question tests Supporting compliance requirements — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Attach to the backend service of the load balancer. — Cloud Armor policies must be attached to a backend service (or backend bucket) of a global HTTP(S) Load Balancer to filter traffic at the edge. This allows the policy to evaluate incoming requests based on geographic location before they reach the backend, enforcing data sovereignty rules without modifying VPC networking or firewall rules.
What should I do if I get this PCSE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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