The correct approach is to create a new hierarchical firewall policy rule that allows egress to the IP range of api.example.com with a higher priority than the deny rule. This works because hierarchical firewall policies in Google Cloud use a priority-based evaluation model, where the rule with the lowest numerical priority value wins, regardless of whether it is an allow or deny. By assigning a higher priority (e.g., a lower number like 100) to the exception rule than the organization-wide deny rule (e.g., 65535), you create a precise override that permits only the specified traffic while preserving the broader security posture. On the Google Professional Cloud Security Engineer exam, this scenario tests your understanding of how hierarchical policies differ from VPC firewall rules—specifically that they are evaluated before VPC rules and that priority is absolute, not relative to rule type. A common trap is assuming you must modify the existing deny rule or use a lower priority; instead, remember that exceptions are always created with higher priority. Memory tip: "High priority beats low number—think of priority as a race where the smallest number crosses the finish line first."
PCSE Configuring network security Practice Question
This PCSE practice question tests your understanding of configuring network security. 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.
A company uses hierarchical firewall policies to enforce security across all VPC networks in an organization. They have an organization policy that denies egress traffic to the internet. However, a team needs to allow outbound HTTPS traffic to a specific external API (api.example.com) for a project. What is the best way to achieve this?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a new hierarchical firewall policy rule that allows egress to the IP range of api.example.com with a higher priority than the deny rule.
Hierarchical firewall policies allow you to enforce organization-wide rules while still permitting exceptions via higher-priority rules. By creating a new rule that allows egress to the IP range of api.example.com with a priority higher than the deny rule, you override the deny for that specific traffic. This approach maintains the organization's security posture while enabling the required outbound HTTPS access.
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.
✓
Create a new hierarchical firewall policy rule that allows egress to the IP range of api.example.com with a higher priority than the deny rule.
Why this is correct
Hierarchical rules follow priority order; a higher priority allow rule overrides a lower priority deny.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure Cloud NAT with a static IP and allow that IP in the org policy.
Why it's wrong here
Cloud NAT does not bypass firewall policies; the policy applies to all egress regardless of source IP.
✗
Remove the organization policy and rely on VPC firewall rules.
Why it's wrong here
Removing the organization policy weakens the overall security posture.
✗
Use VPC Service Controls to allow access to the API.
Why it's wrong here
VPC Service Controls protect Google-managed services, not external APIs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that Cloud NAT or VPC Service Controls can bypass organization-level firewall policies, but only hierarchical firewall rules with appropriate priority can create exceptions to such policies.
Detailed technical explanation
How to think about this question
Hierarchical firewall policies are evaluated in order of priority (lower number = higher priority), and the first matching rule is applied. When a deny-all egress rule exists at the organization level, a higher-priority allow rule for a specific destination IP range will take precedence for that traffic. This mechanism is similar to how VPC firewall rules work but operates across all VPCs in the organization, making it ideal for centralized security with granular exceptions.
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.
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.
Configuring network security — This question tests Configuring network security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a new hierarchical firewall policy rule that allows egress to the IP range of api.example.com with a higher priority than the deny rule. — Hierarchical firewall policies allow you to enforce organization-wide rules while still permitting exceptions via higher-priority rules. By creating a new rule that allows egress to the IP range of api.example.com with a priority higher than the deny rule, you override the deny for that specific traffic. This approach maintains the organization's security posture while enabling the required outbound HTTPS access.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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