- A
AWS Shield Standard
Why wrong: Incorrect. AWS Shield Standard is a free, always-on layer of protection that defends against common DDoS attacks, but it does not include access to the DDoS Response Team or financial protection against scaling costs.
- B
AWS Shield Advanced
Correct. AWS Shield Advanced provides enhanced DDoS detection and mitigation, 24/7 access to the AWS DDoS Response Team (DRT), and financial protection (cost reimbursement) for scaling costs incurred due to a DDoS attack.
- C
AWS WAF
Why wrong: Incorrect. AWS WAF is a web application firewall that helps protect web applications from common exploits like SQL injection or cross-site scripting, but it is not designed for DDoS protection at the network or transport layer.
- D
AWS Firewall Manager
Why wrong: Incorrect. AWS Firewall Manager centralizes the management of firewall rules (such as AWS WAF rules and AWS Shield Advanced protections) across multiple accounts and resources, but it is not a DDoS protection service itself.
Quick Answer
AWS Shield Advanced is the correct choice because it delivers enhanced DDoS protection with cost coverage, including 24/7 access to the AWS DDoS Response Team (DRT) and financial protection against the scaling costs triggered by an attack. Unlike the free Shield Standard, which only defends against basic infrastructure-layer attacks, Shield Advanced provides application-layer detection and automatic mitigation for resources like Application Load Balancers, and crucially, it reimburses the additional AWS charges incurred from auto scaling during a DDoS event. On the CLF-C02 exam, this question tests your ability to distinguish between Shield Standard and Shield Advanced, often pairing it with a scenario about cost risk or needing expert support—a common trap is selecting AWS WAF alone, which lacks DRT access and cost protection. Remember the mnemonic “A.S.C.” for Advanced: Access to DRT, Scaling cost coverage, and Custom mitigations.
CLF-C02 Security and Compliance Practice Question
This CLF-C02 practice question tests your understanding of security and compliance. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 critical web application on AWS behind an Application Load Balancer. The security team is concerned about the risk of Distributed Denial of Service (DDoS) attacks that could deplete application resources and incur high costs due to auto scaling. The company wants a managed service that provides enhanced DDoS detection, access to the AWS DDoS Response Team (DRT), and financial protection against scaling costs associated with DDoS attacks. Which AWS service should the company 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
AWS Shield Advanced
AWS Shield Advanced is the correct choice because it provides enhanced DDoS detection and mitigation beyond what Shield Standard offers, includes 24/7 access to the AWS DDoS Response Team (DRT) for custom mitigations, and offers financial protection (cost protection) against scaling costs incurred due to DDoS attacks on resources like Application Load Balancers. This directly addresses the company's need for a managed service that covers detection, expert support, and cost coverage.
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.
- ✗
AWS Shield Standard
Why it's wrong here
Incorrect. AWS Shield Standard is a free, always-on layer of protection that defends against common DDoS attacks, but it does not include access to the DDoS Response Team or financial protection against scaling costs.
- ✓
AWS Shield Advanced
Why this is correct
Correct. AWS Shield Advanced provides enhanced DDoS detection and mitigation, 24/7 access to the AWS DDoS Response Team (DRT), and financial protection (cost reimbursement) for scaling costs incurred due to a DDoS attack.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS WAF
Why it's wrong here
Incorrect. AWS WAF is a web application firewall that helps protect web applications from common exploits like SQL injection or cross-site scripting, but it is not designed for DDoS protection at the network or transport layer.
- ✗
AWS Firewall Manager
Why it's wrong here
Incorrect. AWS Firewall Manager centralizes the management of firewall rules (such as AWS WAF rules and AWS Shield Advanced protections) across multiple accounts and resources, but it is not a DDoS protection service itself.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS Shield Standard (free, basic) with AWS Shield Advanced (paid, enhanced) or mistakenly think AWS WAF alone can handle DDoS cost protection and DRT access, when in fact WAF lacks those specific features.
Detailed technical explanation
How to think about this question
AWS Shield Advanced uses a combination of always-on traffic monitoring and inline mitigation techniques, including BGP route advertisements and flow-based heuristics, to detect and filter DDoS traffic at the AWS edge. The cost protection benefit automatically applies credits for any charges (e.g., EC2 auto scaling, ALB data transfer) that result from a validated DDoS attack, up to the monthly subscription fee. A subtle behavior is that Shield Advanced requires you to associate protected resources (like ALBs) with a Shield Advanced subscription and can trigger AWS WAF rate-based rules automatically for application-layer attacks.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Security and Compliance — study guide chapter
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Shield Advanced — AWS Shield Advanced is the correct choice because it provides enhanced DDoS detection and mitigation beyond what Shield Standard offers, includes 24/7 access to the AWS DDoS Response Team (DRT) for custom mitigations, and offers financial protection (cost protection) against scaling costs incurred due to DDoS attacks on resources like Application Load Balancers. This directly addresses the company's need for a managed service that covers detection, expert support, and cost coverage.
What should I do if I get this CLF-C02 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.
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: Jun 11, 2026
This CLF-C02 practice question is part of Courseiva's free Amazon Web Services 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 CLF-C02 exam.
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