- A
Cloud Firewall (VPC firewall rules)
Why wrong: VPC firewall rules operate at the network level (IP/port filtering) inside the VPC. They don't inspect HTTP request content for application-layer attacks like SQL injection.
- B
Cloud Armor
Cloud Armor provides DDoS protection and WAF capabilities at the load balancer edge. It can block volumetric DDoS attacks and inspect HTTP content for SQL injection, XSS, and other OWASP threats before they reach application servers.
- C
Cloud VPN
Why wrong: Cloud VPN creates encrypted tunnels between networks for private connectivity. It's not a security inspection service for public internet traffic.
- D
Cloud Identity-Aware Proxy (IAP)
Why wrong: IAP controls authenticated user access to applications (identity gate). It doesn't protect against DDoS attacks or inspect traffic for SQL injection patterns.
Cloud Digital Leader Practice Question: Google Cloud products, services, and solutions
This GCDL practice question tests your understanding of google cloud products, services, and solutions. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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's web application faces DDoS attacks and SQL injection attempts from the internet. They need a service that sits in front of their load balancer to block malicious traffic before it reaches their application servers. Which Google Cloud service provides this protection?
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
Cloud Armor
Cloud Armor is Google Cloud's web application firewall (WAF) and DDoS mitigation service that operates at the edge of Google's network, in front of the load balancer. It can filter incoming traffic based on Layer 7 rules (e.g., SQL injection patterns, cross-site scripting) and Layer 3/4 conditions (e.g., IP reputation, rate limiting), blocking malicious requests before they reach the load balancer or application servers. This makes it the correct choice for protecting against both DDoS attacks and SQL injection attempts at the network perimeter.
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.
- ✗
Cloud Firewall (VPC firewall rules)
- ✓
Cloud Armor
Why this is correct
Cloud Armor provides DDoS protection and WAF capabilities at the load balancer edge. It can block volumetric DDoS attacks and inspect HTTP content for SQL injection, XSS, and other OWASP threats before they reach application servers.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Cloud VPN
Why it's wrong here
Cloud VPN creates encrypted tunnels between networks for private connectivity. It's not a security inspection service for public internet traffic.
- ✗
Cloud Identity-Aware Proxy (IAP)
Why it's wrong here
IAP controls authenticated user access to applications (identity gate). It doesn't protect against DDoS attacks or inspect traffic for SQL injection patterns.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse Cloud Armor (a WAF/DDoS protection service) with VPC firewall rules (Cloud Firewall), which only provide stateful packet filtering at the network layer and cannot inspect application-layer attacks like SQL injection.
Detailed technical explanation
How to think about this question
Cloud Armor uses Google's global anycast edge infrastructure to absorb and filter traffic close to the source, leveraging pre-configured rules from the ModSecurity Core Rule Set (CRS) for SQL injection and XSS detection. It integrates with Cloud Load Balancing (both HTTP(S) and TCP/UDP) and supports custom rules using Common Expression Language (CEL) for granular traffic filtering, such as blocking specific geographies or IP ranges. A subtle behavior is that Cloud Armor can also provide rate limiting and adaptive protection, which learns normal traffic patterns to automatically adjust rules against evolving DDoS tactics.
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.
TExam Day Tips
- 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 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.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this GCDL question test?
Google Cloud products, services, and solutions — This question tests Google Cloud products, services, and solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Cloud Armor — Cloud Armor is Google Cloud's web application firewall (WAF) and DDoS mitigation service that operates at the edge of Google's network, in front of the load balancer. It can filter incoming traffic based on Layer 7 rules (e.g., SQL injection patterns, cross-site scripting) and Layer 3/4 conditions (e.g., IP reputation, rate limiting), blocking malicious requests before they reach the load balancer or application servers. This makes it the correct choice for protecting against both DDoS attacks and SQL injection attempts at the network perimeter.
What should I do if I get this GCDL question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This GCDL 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 GCDL exam.
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