- A
Create a VPC firewall rule allowing ingress from the on-premises IP to the BigQuery API.
Why wrong: VPC firewall rules do not control access to Google APIs; VPC Service Controls policies do.
- B
Exempt the on-premises service account from the perimeter.
Why wrong: Exempting a service account removes all perimeter restrictions for that account, which is broader than needed.
- C
Use Private Google Access from the on-premises network.
Why wrong: Private Google Access provides connectivity to Google APIs from on-premises via VPN or Interconnect, but does not bypass VPC Service Controls.
- D
Add the on-premises IP to an access level and create an ingress rule in the service perimeter.
Correct: An access level can be defined using the IP address, and an ingress rule allows that access level to cross the perimeter.
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.
A company has a VPC Service Controls perimeter that includes BigQuery and Cloud Storage. They need to allow a specific on-premises application (with a static IP) to access a BigQuery dataset within the perimeter. Which configuration should they use?
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
Add the on-premises IP to an access level and create an ingress rule in the service perimeter.
VPC Service Controls allows ingress rules to permit traffic from specific identities or IP ranges into the perimeter. They need to create an ingress rule that allows the on-premises IP to access BigQuery.
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 VPC firewall rule allowing ingress from the on-premises IP to the BigQuery API.
Why it's wrong here
VPC firewall rules do not control access to Google APIs; VPC Service Controls policies do.
- ✗
Exempt the on-premises service account from the perimeter.
Why it's wrong here
Exempting a service account removes all perimeter restrictions for that account, which is broader than needed.
- ✗
Use Private Google Access from the on-premises network.
Why it's wrong here
Private Google Access provides connectivity to Google APIs from on-premises via VPN or Interconnect, but does not bypass VPC Service Controls.
- ✓
Add the on-premises IP to an access level and create an ingress rule in the service perimeter.
Why this is correct
Correct: An access level can be defined using the IP address, and an ingress rule allows that access level to cross the perimeter.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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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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: Add the on-premises IP to an access level and create an ingress rule in the service perimeter. — VPC Service Controls allows ingress rules to permit traffic from specific identities or IP ranges into the perimeter. They need to create an ingress rule that allows the on-premises IP to access BigQuery.
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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