- A
Create a Cloud Armor rule to allow the on-premises IP
Why wrong: Cloud Armor protects HTTP(S) load balancers, not BigQuery access.
- B
Use Private Google Access for the on-premises network
Why wrong: Private Google Access enables private connectivity from VPC, not from on-premises static IPs.
- C
Create an ingress rule in the service perimeter with the on-premises IP as the source
An ingress rule with the source IP allows traffic from that IP into the perimeter for specified services.
- D
Add the on-premises IP to an access level and create an egress rule
Why wrong: Egress rules control outbound traffic from the perimeter; ingress rules control inbound traffic.
Question 838 of 985
PCSE Configuring Network Security Practice Question
This PCSE practice question tests your understanding of configuring network security. 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.
An organization uses VPC Service Controls to protect BigQuery datasets. They need to allow a specific on-premises application, which uses a static IP address, to query a BigQuery dataset inside the service perimeter. Which configuration is required?
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
✓
Create an ingress rule in the service perimeter with the on-premises IP as the source
VPC Service Controls allow ingress rules to permit traffic from specific IP ranges into a perimeter. By creating an ingress rule that allows the on-premises IP and specifies the BigQuery API, the on-premises application can access the dataset.
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.
- ✗
Create a Cloud Armor rule to allow the on-premises IP
Why it's wrong here
Cloud Armor protects HTTP(S) load balancers, not BigQuery access.
- ✗
Use Private Google Access for the on-premises network
Why it's wrong here
Private Google Access enables private connectivity from VPC, not from on-premises static IPs.
- ✓
Create an ingress rule in the service perimeter with the on-premises IP as the source
Why this is correct
An ingress rule with the source IP allows traffic from that IP into the perimeter for specified services.
Related concept
Standard ACLs match source addresses.
- ✗
Add the on-premises IP to an access level and create an egress rule
Why it's wrong here
Egress rules control outbound traffic from the perimeter; ingress rules control inbound traffic.
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 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 PCSE ACL questions on filtering logic and placement.
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Configuring Network Security — study guide chapter
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FAQ
Questions learners often ask
What does this PCSE question test?
Configuring Network Security — This question tests Configuring Network Security — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Create an ingress rule in the service perimeter with the on-premises IP as the source — VPC Service Controls allow ingress rules to permit traffic from specific IP ranges into a perimeter. By creating an ingress rule that allows the on-premises IP and specifies the BigQuery API, the on-premises application can access the dataset.
What should I do if I get this PCSE 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 PCSE 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 PCSE 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 PCSE exam.
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