- A
A Cloud CDN cache rule
Why wrong: Cloud CDN is for content caching, not security policies.
- B
A Cloud Armor security policy with one rule that combines IP deny and rate limiting
Why wrong: IP deny and rate limiting are separate rule types and cannot be combined in one rule.
- C
A Cloud Armor security policy with two rules: one for IP deny and one for rate limiting
A single policy can contain multiple rules to achieve both requirements.
- D
A network firewall rule to block the IP range
Why wrong: Network firewall rules operate at the network layer, not the application layer.
- E
An HTTPS load balancer with the security policy attached
Cloud Armor policies are attached to the backend service of an HTTPS load balancer.
Question 837 of 982
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 wants to use Cloud Armor to block traffic from a specific IP range (198.51.100.0/24) and also apply rate limiting. Which TWO components are needed? (Select 2)
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
✓
A Cloud Armor security policy with two rules: one for IP deny and one for rate limiting
Cloud Armor security policies contain rules with conditions like IP ranges and rate limiting. The policy is attached to a backend service of an HTTPS load balancer.
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.
- ✗
A Cloud CDN cache rule
Why it's wrong here
Cloud CDN is for content caching, not security policies.
- ✗
A Cloud Armor security policy with one rule that combines IP deny and rate limiting
Why it's wrong here
IP deny and rate limiting are separate rule types and cannot be combined in one rule.
- ✓
A Cloud Armor security policy with two rules: one for IP deny and one for rate limiting
Why this is correct
A single policy can contain multiple rules to achieve both requirements.
Related concept
Standard ACLs match source addresses.
- ✗
A network firewall rule to block the IP range
Why it's wrong here
Network firewall rules operate at the network layer, not the application layer.
- ✓
An HTTPS load balancer with the security policy attached
Why this is correct
Cloud Armor policies are attached to the backend service of an HTTPS load balancer.
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.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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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Implementing VPC Instances — study guide chapter
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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: A Cloud Armor security policy with two rules: one for IP deny and one for rate limiting — Cloud Armor security policies contain rules with conditions like IP ranges and rate limiting. The policy is attached to a backend service of an HTTPS load balancer.
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.
About these practice questions
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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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