The answer is to use Cloud Armor security policies with geographic-based denylist rules. This is correct because Cloud Armor evaluates incoming requests at the edge of Google’s network, applying geolocation data from client IP addresses to either allow or deny traffic before it ever reaches your Cloud Load Balancing backends. For a multinational corporation enforcing GDPR, blocking non-EU countries at the edge is both the most efficient and compliant approach, as it reduces unnecessary load and ensures data sovereignty restrictions are met before any processing occurs. On the Google Professional Cloud Architect exam, this scenario tests your understanding of edge security versus backend filtering; a common trap is suggesting IAP or VPC firewall rules, which operate after the load balancer and cannot enforce country-level blocks at the edge. Remember the mnemonic “Edge First, GDPR Best”—Cloud Armor acts first, so use it for geographic denylists.
Google PCA Design for security and compliance Practice Question
This PCA practice question tests your understanding of design for security and compliance. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 multinational corporation operates in multiple regions and must comply with GDPR. They use Cloud Load Balancing to distribute traffic across regional backends. Their security team wants to block traffic from specific countries (e.g., non-EU countries) at the edge. What should they use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Cloud Armor security policies with geographic-based denylist rules.
Cloud Armor security policies support geographic-based access control using denylist or allowlist rules that match client IP addresses against country-level geolocation data. This allows the security team to block traffic from specific countries at the edge, before it reaches the backend, which is the most efficient and compliant approach for GDPR enforcement.
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.
✗
Configure Cloud CDN to serve content only to EU-based users.
Why it's wrong here
Cloud CDN does not have geo-blocking capabilities.
✓
Use Cloud Armor security policies with geographic-based denylist rules.
Why this is correct
Cloud Armor can block traffic from specific countries at the Google Cloud edge.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set VPC firewall rules to allow traffic only from EU IP ranges.
Why it's wrong here
VPC firewall rules are regional and not designed for global geo-blocking.
✗
Configure Identity-Aware Proxy (IAP) to require user authentication from allowed countries.
Why it's wrong here
IAP is for application access control, not filtering at the edge.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse VPC firewall rules (which filter by IP ranges) with Cloud Armor's geolocation-based policies, or they assume Cloud CDN or IAP can enforce geographic access control, when in fact only Cloud Armor provides native country-level blocking at the edge.
Detailed technical explanation
How to think about this question
Cloud Armor uses MaxMind GeoIP2 databases to map client IP addresses to countries, and the geographic matching is performed at the Google Front End (GFE) before traffic reaches the backend. This is critical for GDPR compliance because it ensures that data from non-EU countries is blocked at the edge, reducing the risk of unauthorized data transfer. A subtle behavior is that Cloud Armor rules are evaluated in order, and a denylist rule for specific countries must be placed before any allow rules to take effect.
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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Design for security and compliance — This question tests Design for security and compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Cloud Armor security policies with geographic-based denylist rules. — Cloud Armor security policies support geographic-based access control using denylist or allowlist rules that match client IP addresses against country-level geolocation data. This allows the security team to block traffic from specific countries at the edge, before it reaches the backend, which is the most efficient and compliant approach for GDPR enforcement.
What should I do if I get this PCA 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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