PCNE Implementing VPC Instances Practice Question
A company has an HTTP Load Balancer that distributes traffic to a backend service consisting of Compute Engine instance groups. They need to block traffic from specific geographic regions and also rate-limit requests from any IP. Which THREE Cloud Armor features should they configure?
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
✓
Rate limiting rules
Cloud Armor security policies allow you to create rules with conditions. To block regions, use geoblocking by specifying source regions. To rate-limit, use rate limiting rules. Custom rules can also be used to combine conditions. Pre-configured WAF rules (like XSS, SQLi) are for web application attacks, not region blocking or rate limiting.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Cloud Armor logging
Why it's wrong here
Logging is not a security feature that blocks or rate-limits traffic.
- ✓
Rate limiting rules
Why this is correct
Limits the number of requests from a source IP to prevent abuse.
- ✗
Pre-configured WAF rules (e.g., OWASP Top 10)
Why it's wrong here
These protect against web exploits, not geoblocking or rate limiting.
- ✓
Geo-based access control (geoblocking)
Why this is correct
Enables blocking/allowing traffic from specific countries or regions.
- ✓
Custom rules with IP allow/deny
Why this is correct
Can be used to implement geoblocking and rate limiting, but the statement asks for features; geoblocking and rate limiting are specific features.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.