- A
Cloud CDN
Why wrong: Cloud CDN accelerates content delivery but does not provide security filtering.
- B
Cloud NAT
Why wrong: Cloud NAT enables outbound internet access for VMs without external IPs; it does not filter inbound traffic.
- C
Cloud Armor
Cloud Armor provides DDoS protection, WAF, IP allow/deny lists, and geo-based access control.
- D
VPC firewall rules
Why wrong: VPC firewall rules control traffic at the network level but lack IP reputation and geo-filtering capabilities.
Question 72 of 1,000
Cloud Digital Leader Google Cloud Products and Services Practice Question
This GCDL practice question tests your understanding of google cloud products and services. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 runs a global web application hosted on Compute Engine behind a Cloud Load Balancer. They want to protect against DDoS attacks and filter incoming traffic based on IP reputation and geolocation. Which Google Cloud service 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
✓
Cloud Armor
Cloud Armor is a web application firewall (WAF) and DDoS protection service that integrates with Cloud Load Balancing. It allows IP allow/deny lists, rate limiting, and predefined rules to block traffic based on geo-location and threat intelligence. VPC firewall rules operate at the network level but cannot inspect application-layer traffic or use IP reputation. Cloud CDN caches content but does not filter traffic. Cloud NAT provides outbound connectivity only.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 CDN
Why it's wrong here
Cloud CDN accelerates content delivery but does not provide security filtering.
- ✗
Cloud NAT
- ✓
Cloud Armor
Why this is correct
Cloud Armor provides DDoS protection, WAF, IP allow/deny lists, and geo-based access control.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
VPC firewall rules
Why it's wrong here
VPC firewall rules control traffic at the network level but lack IP reputation and geo-filtering capabilities.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related GCDL NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this GCDL question test?
Google Cloud Products and Services — This question tests Google Cloud Products and Services — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Cloud Armor — Cloud Armor is a web application firewall (WAF) and DDoS protection service that integrates with Cloud Load Balancing. It allows IP allow/deny lists, rate limiting, and predefined rules to block traffic based on geo-location and threat intelligence. VPC firewall rules operate at the network level but cannot inspect application-layer traffic or use IP reputation. Cloud CDN caches content but does not filter traffic. Cloud NAT provides outbound connectivity only.
What should I do if I get this GCDL question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related GCDL NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jul 4, 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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