Google PCA Manage implementation of cloud architecture Practice Question
Which TWO of the following are benefits of using a VPC Service Controls perimeter?
⚠ Common exam trap
Google Cloud often tests the misconception that VPC Service Controls are a firewall or encryption mechanism, when in fact they are a context-aware access boundary that works alongside IAM and network controls.
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
✓
Prevent data exfiltration from managed services like BigQuery and Cloud Storage
VPC Service Controls perimeters prevent data exfiltration by creating a security boundary around Google Cloud managed services (e.g., BigQuery, Cloud Storage). Within the perimeter, data can only be copied to other resources inside the same perimeter, blocking unauthorized transfers to external projects or the internet. This is achieved through context-aware access policies that enforce data access based on the client's network identity and project membership, not by inspecting packet contents.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Prevent data exfiltration from managed services like BigQuery and Cloud Storage
Why this is correct
VPC Service Controls restrict data movement outside the perimeter.
- ✗
Act as a network firewall for Compute Engine instances
Why it's wrong here
VPC Service Controls are not a firewall; Cloud Armor or firewall rules are for that.
- ✗
Provide encryption of data in transit between on-premises and Google Cloud
Why it's wrong here
Encryption is handled by other means (e.g., VPN, TLS).
- ✗
Replace Identity and Access Management (IAM) for service access control
Why it's wrong here
VPC Service Controls work with IAM, not replace it.
- ✓
Allow access to Google Cloud services only from within an authorized VPC network
Why this is correct
Perimeters restrict access to origins within the allowed VPC.
Go deeper
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Learn chapter
Introduction to Google Cloud Platform
Key term
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCA 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 PCA exam.