- A
Add Cloud Storage and BigQuery to the list of restricted services in the perimeter (they already are)
Why wrong: The services are already part of the perimeter; no need to repeat.
- B
An ingress rule that allows the on-premises service account to access Cloud Storage and BigQuery
Ingress rules allow external identities to access resources inside the perimeter.
- C
An access level based on the on-premises IP range (10.0.0.0/8)
Access levels are used in ingress rules to restrict access to specific IP ranges or devices.
- D
A VPC firewall rule allowing traffic from the VPN to the Cloud Storage and BigQuery APIs
Why wrong: Firewall rules do not control API access; they control traffic to VM instances.
- E
An egress rule that allows the on-premises service account to leave the perimeter
Why wrong: Egress rules control data leaving the perimeter, not entering.
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 is implementing VPC Service Controls to protect a project that contains Cloud Storage and BigQuery. They want to allow a specific on-premises service account to read data from Cloud Storage and write to BigQuery. The on-premises network connects via Cloud VPN. Which TWO components must be configured in the service perimeter? (Choose two.)
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
An ingress rule that allows the on-premises service account to access Cloud Storage and BigQuery
To allow external access, you need an ingress rule that specifies the source (on-premises service account and the Cloud VPN network) and the allowed services (Cloud Storage and BigQuery). An access level can be used to define the IP range, but the ingress rule is the primary mechanism. Adding the service to the perimeter is already done; you don't need to add it again. An egress rule is not needed for inbound 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.
- ✗
Add Cloud Storage and BigQuery to the list of restricted services in the perimeter (they already are)
Why it's wrong here
The services are already part of the perimeter; no need to repeat.
- ✓
An ingress rule that allows the on-premises service account to access Cloud Storage and BigQuery
Why this is correct
Ingress rules allow external identities to access resources inside the perimeter.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
An access level based on the on-premises IP range (10.0.0.0/8)
Why this is correct
Access levels are used in ingress rules to restrict access to specific IP ranges or devices.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A VPC firewall rule allowing traffic from the VPN to the Cloud Storage and BigQuery APIs
- ✗
An egress rule that allows the on-premises service account to leave the perimeter
Why it's wrong here
Egress rules control data leaving the perimeter, not entering.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 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.
Identify which PCSE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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 — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: An ingress rule that allows the on-premises service account to access Cloud Storage and BigQuery — To allow external access, you need an ingress rule that specifies the source (on-premises service account and the Cloud VPN network) and the allowed services (Cloud Storage and BigQuery). An access level can be used to define the IP range, but the ingress rule is the primary mechanism. Adding the service to the perimeter is already done; you don't need to add it again. An egress rule is not needed for inbound access.
What should I do if I get this PCSE question wrong?
Identify which PCSE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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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