- A
Amazon S3 Transfer Acceleration
Why wrong: S3 Transfer Acceleration speeds up uploads to an S3 bucket by optimizing the network path, but it does not cache content for user downloads, nor does it provide DDoS protection. It is not designed to reduce latency for end-user content delivery.
- B
AWS Global Accelerator
Why wrong: AWS Global Accelerator improves TCP/UDP traffic performance by directing users to the nearest healthy endpoint, but it does not cache content or provide application-layer DDoS protection. It focuses on network performance rather than content distribution.
- C
Amazon CloudFront
Amazon CloudFront caches content at edge locations globally, significantly reducing latency for users. It also includes AWS Shield Standard, which automatically protects against common DDoS attacks. This combination meets both the performance and security requirements without additional charges.
- D
AWS Shield Advanced
Why wrong: AWS Shield Advanced provides enhanced DDoS protection and 24/7 support from the AWS DDoS Response Team, but it does not improve content delivery performance. It also incurs additional monthly costs and a usage commitment, which does not align with the requirement to avoid additional charges.
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. 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 global e-commerce company stores product images and videos in an Amazon S3 bucket located in the us-west-2 Region. Customers worldwide report slow page load times. The company also wants to protect its website against common distributed denial-of-service (DDoS) attacks without incurring additional costs for a dedicated DDoS protection service. Which AWS service should the company use to meet both requirements?
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
Amazon CloudFront
Amazon CloudFront is a content delivery network (CDN) that caches content at edge locations worldwide, reducing latency for global users. It also includes AWS Shield Standard at no additional cost, which provides always-on protection against common DDoS attacks (e.g., SYN floods, UDP reflection). This combination directly addresses both the slow page load times and the need for cost-effective DDoS protection.
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.
- ✗
Amazon S3 Transfer Acceleration
Why it's wrong here
S3 Transfer Acceleration speeds up uploads to an S3 bucket by optimizing the network path, but it does not cache content for user downloads, nor does it provide DDoS protection. It is not designed to reduce latency for end-user content delivery.
When this WOULD be correct
A company needs to upload large files to S3 from geographically distributed locations and wants to minimize upload latency. The question would specify that the performance issue is with uploads, not downloads, and DDoS protection is not a requirement.
- ✗
AWS Global Accelerator
Why it's wrong here
AWS Global Accelerator improves TCP/UDP traffic performance by directing users to the nearest healthy endpoint, but it does not cache content or provide application-layer DDoS protection. It focuses on network performance rather than content distribution.
When this WOULD be correct
A company needs to improve performance for global users by directing traffic to the nearest healthy endpoint (e.g., an Application Load Balancer) and requires static IP addresses for whitelisting. Global Accelerator would be correct because it provides anycast static IPs and traffic optimization without needing edge caching.
- ✓
Amazon CloudFront
Why this is correct
Amazon CloudFront caches content at edge locations globally, significantly reducing latency for users. It also includes AWS Shield Standard, which automatically protects against common DDoS attacks. This combination meets both the performance and security requirements without additional charges.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Shield Advanced
Why it's wrong here
AWS Shield Advanced provides enhanced DDoS protection and 24/7 support from the AWS DDoS Response Team, but it does not improve content delivery performance. It also incurs additional monthly costs and a usage commitment, which does not align with the requirement to avoid additional charges.
When this WOULD be correct
A company needs advanced DDoS protection (e.g., against layer 7 attacks, real-time visibility, and cost protection) and is willing to pay a monthly fee. The question would specify 'requires enhanced DDoS protection and has budget for a dedicated service'.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The CLF-C02 exam frequently reuses these exact scenarios with slightly different constraints.
✓Amazon CloudFrontCorrect answer▾
Why this is correct
Amazon CloudFront caches content at edge locations globally, significantly reducing latency for users. It also includes AWS Shield Standard, which automatically protects against common DDoS attacks. This combination meets both the performance and security requirements without additional charges.
✗Amazon S3 Transfer AccelerationWrong answer — click to see why▾
Why this is wrong here
Amazon S3 Transfer Acceleration only speeds up uploads to S3, not content delivery to end users, and it does not provide DDoS protection.
★ When this WOULD be the correct answer
A company needs to upload large files to S3 from geographically distributed locations and wants to minimize upload latency. The question would specify that the performance issue is with uploads, not downloads, and DDoS protection is not a requirement.
Why candidates choose this
Candidates may think 'acceleration' implies faster content delivery globally and overlook that it only accelerates uploads, not downloads, and lacks DDoS protection.
✗AWS Global AcceleratorWrong answer — click to see why▾
Why this is wrong here
AWS Global Accelerator improves latency by routing traffic over the AWS global network, but it does not provide DDoS protection beyond the default AWS Shield Standard. The question requires DDoS protection without additional cost, and CloudFront includes AWS Shield Standard at no extra cost, while Global Accelerator does not offer built-in DDoS mitigation.
★ When this WOULD be the correct answer
A company needs to improve performance for global users by directing traffic to the nearest healthy endpoint (e.g., an Application Load Balancer) and requires static IP addresses for whitelisting. Global Accelerator would be correct because it provides anycast static IPs and traffic optimization without needing edge caching.
Why candidates choose this
Candidates may confuse Global Accelerator's global network optimization with CloudFront's CDN capabilities, assuming both provide similar performance benefits, and overlook that Global Accelerator lacks integrated DDoS protection features.
✗AWS Shield AdvancedWrong answer — click to see why▾
Why this is wrong here
AWS Shield Advanced is a paid service that provides enhanced DDoS protection, but the question explicitly requires no additional costs for a dedicated DDoS protection service. CloudFront includes AWS Shield Standard at no extra cost, meeting both requirements.
★ When this WOULD be the correct answer
A company needs advanced DDoS protection (e.g., against layer 7 attacks, real-time visibility, and cost protection) and is willing to pay a monthly fee. The question would specify 'requires enhanced DDoS protection and has budget for a dedicated service'.
Why candidates choose this
Candidates may think Shield Advanced is the only DDoS protection option, overlooking that CloudFront includes basic DDoS protection (Shield Standard) at no extra cost, and also provides global content delivery to reduce latency.
Analysis generated from the official CLF-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse AWS Global Accelerator with a CDN, but Global Accelerator does not cache content—it only optimizes network routing, so it cannot reduce latency for repeated requests to static assets like images and videos.
Detailed technical explanation
How to think about this question
CloudFront integrates with AWS Shield Standard automatically, which uses deterministic packet filtering and rate-based heuristics to mitigate Layer 3/4 attacks at the edge. For static content, CloudFront caches objects at over 600 Points of Presence (PoPs) globally, serving requests from the nearest edge location rather than the origin S3 bucket in us-west-2, which can reduce latency by 50-80% for distant users. A subtle behavior: CloudFront can also serve dynamic content by establishing persistent connections to the origin, but for static assets, the cache hit ratio is critical for performance gains.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon CloudFront — Amazon CloudFront is a content delivery network (CDN) that caches content at edge locations worldwide, reducing latency for global users. It also includes AWS Shield Standard at no additional cost, which provides always-on protection against common DDoS attacks (e.g., SYN floods, UDP reflection). This combination directly addresses both the slow page load times and the need for cost-effective DDoS protection.
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.
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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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