- A
Folder allow rule priority 100, folder deny rule priority 200.
Why wrong: This is correct only if the allow is at folder level, but the scenario says organization allow.
- B
Remove the folder deny rule and use network firewall rules.
Why wrong: The scenario requires hierarchical policies; removing is not the only solution.
- C
Organization allow rule priority 200, folder deny rule priority 100.
Why wrong: Folder deny with priority 100 overrides the allow.
- D
Organization allow rule priority 100, folder deny rule priority 200.
Priority 100 is higher (lower number) than 200, so allow overrides deny.
Question 291 of 1,000
PCNE Implementing VPC Instances Practice Question
This PCNE practice question tests your understanding of implementing vpc instances. 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 at the organization level. They need to allow SSH (TCP 22) access from a specific range 10.0.0.0/8 to all VMs, but a child folder has a policy that denies all ingress traffic. Which rule priority ordering ensures SSH access is allowed?
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
✓
Organization allow rule priority 100, folder deny rule priority 200.
Hierarchical firewall rules have priorities; higher priority (lower number) wins. To override a deny-all, the allow rule must have a lower priority number than the deny rule. The organization policy can have a lower priority than the folder policy, but the folder's deny-all would block. The organization's allow rule must have higher priority (lower number) than the folder's deny rule.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Folder allow rule priority 100, folder deny rule priority 200.
Why it's wrong here
This is correct only if the allow is at folder level, but the scenario says organization allow.
- ✗
Remove the folder deny rule and use network firewall rules.
Why it's wrong here
The scenario requires hierarchical policies; removing is not the only solution.
- ✗
Organization allow rule priority 200, folder deny rule priority 100.
Why it's wrong here
Folder deny with priority 100 overrides the allow.
- ✓
Organization allow rule priority 100, folder deny rule priority 200.
Why this is correct
Priority 100 is higher (lower number) than 200, so allow overrides deny.
Related concept
Standard ACLs match source addresses.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Trap categories for this question
Scenario analysis trap
This is correct only if the allow is at folder level, but the scenario says organization allow.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PCNE ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this PCNE question test?
Implementing VPC Instances — This question tests Implementing VPC Instances — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Organization allow rule priority 100, folder deny rule priority 200. — Hierarchical firewall rules have priorities; higher priority (lower number) wins. To override a deny-all, the allow rule must have a lower priority number than the deny rule. The organization policy can have a lower priority than the folder policy, but the folder's deny-all would block. The organization's allow rule must have higher priority (lower number) than the folder's deny rule.
What should I do if I get this PCNE question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PCNE ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jul 4, 2026
This PCNE 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 PCNE exam.
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