CLF-C02 Cloud Technology and Services Practice Question
A company hosts its website on a single Amazon EC2 instance in the us-east-1 Region. The website includes static assets such as images, CSS, and JavaScript files. Users in Europe and Asia report that the website loads slowly because the static assets must travel from the us-east-1 Region. The company wants to reduce latency for global users and decrease the load on the EC2 instance by serving static content from locations that are closer to the users. Which AWS service should the company use to meet these requirements?
⚠ Common exam trap
Many candidates confuse AWS Global Accelerator (which optimizes network path but does not cache) with a CDN, or think Route 53 latency-based routing alone can serve content from edge locations, when in fact it only directs traffic to the same single origin.
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 static assets (images, CSS, JavaScript) at edge locations worldwide. By serving content from edge locations closer to users in Europe and Asia, CloudFront reduces latency and offloads requests from the origin EC2 instance, decreasing its load. This directly meets the requirements for global latency reduction and reduced EC2 load.
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 CloudFront
Why this is correct
Amazon CloudFront is a global content delivery network (CDN) that caches static content such as images, CSS, and JavaScript at edge locations closer to end users. This reduces latency because users fetch objects from the nearest edge rather than the single EC2 origin. Additionally, because edge caches serve repeated requests, the load on the EC2 instance is significantly reduced. For dynamic content, CloudFront can still improve performance by maintaining persistent connections to the origin and optimizing TLS handshakes, but the primary benefit here is edge caching.
- ✗
AWS Global Accelerator
Why it's wrong here
Incorrect. Global Accelerator improves performance for TCP/UDP traffic by routing it over the AWS global network and providing anycast IPs, but it does not cache content. It still requires each request to reach the origin server.
When this WOULD be correct
A company runs a real-time gaming application on EC2 in us-east-1 and needs to reduce latency for UDP traffic from global users while maintaining a fixed entry point. AWS Global Accelerator would be correct because it provides static IP addresses and optimizes the network path for non-HTTP protocols.
- ✗
Amazon Route 53 with latency-based routing
Why it's wrong here
Amazon Route 53 with latency-based routing is a DNS traffic-management policy, not a caching service. It responds to DNS queries by directing users to the AWS region that appears to have the lowest latency, but the actual content still must be fetched from the origin EC2 instance. In this scenario, there is only one EC2 instance in one region, so latency-based routing has no alternate healthy endpoints to choose from; it simply resolves to that same instance. Thus, it does not reduce latency to end users or offload any traffic from the origin, making it unsuitable for improving global performance.
When this WOULD be correct
A company has multiple EC2 instances in different AWS regions and wants to route users to the region with the lowest latency for dynamic content or application endpoints, not for caching static assets.
- ✗
Amazon S3 Transfer Acceleration
Why it's wrong here
Incorrect. S3 Transfer Acceleration speeds up uploads of objects to an S3 bucket from remote clients by using AWS edge locations. It is designed for upload to a specific bucket, not for caching and serving content to end users.
When this WOULD be correct
A company needs to upload large files (e.g., video archives) from Europe to an S3 bucket in us-west-2, and wants to minimize upload time over long distances. S3 Transfer Acceleration would be the correct choice.
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 is a global content delivery network (CDN) that caches static content such as images, CSS, and JavaScript at edge locations closer to end users. This reduces latency because users fetch objects from the nearest edge rather than the single EC2 origin. Additionally, because edge caches serve repeated requests, the load on the EC2 instance is significantly reduced. For dynamic content, CloudFront can still improve performance by maintaining persistent connections to the origin and optimizing TLS handshakes, but the primary benefit here is edge caching.
✗AWS Global AcceleratorWrong answer — click to see why▾
Why this is wrong here
AWS Global Accelerator improves performance for TCP/UDP traffic by routing over the AWS global network, but it does not cache static content at edge locations; it still requires the EC2 instance to serve the assets, so it doesn't reduce load on the origin server.
★ When this WOULD be the correct answer
A company runs a real-time gaming application on EC2 in us-east-1 and needs to reduce latency for UDP traffic from global users while maintaining a fixed entry point. AWS Global Accelerator would be correct because it provides static IP addresses and optimizes the network path for non-HTTP protocols.
Why candidates choose this
Candidates may confuse Global Accelerator's edge-based routing with CloudFront's caching, thinking both reduce latency by bringing traffic closer to users, but they overlook that Global Accelerator does not cache content.
✗Amazon Route 53 with latency-based routingWrong answer — click to see why▾
Why this is wrong here
Amazon Route 53 with latency-based routing directs traffic to the nearest healthy endpoint, but it does not cache or serve static content from edge locations; it still requires the EC2 instance to handle all requests, failing to reduce load on the instance.
★ When this WOULD be the correct answer
A company has multiple EC2 instances in different AWS regions and wants to route users to the region with the lowest latency for dynamic content or application endpoints, not for caching static assets.
Why candidates choose this
Candidates may think latency-based routing directly reduces latency by routing users to a nearby server, but they overlook that it doesn't cache content or offload the origin server, which is needed for static assets.
✗Amazon S3 Transfer AccelerationWrong answer — click to see why▾
Why this is wrong here
Amazon S3 Transfer Acceleration speeds up uploads to S3 over long distances, but does not serve cached content from edge locations to end users; it only accelerates data transfer into S3, not out to global users.
★ When this WOULD be the correct answer
A company needs to upload large files (e.g., video archives) from Europe to an S3 bucket in us-west-2, and wants to minimize upload time over long distances. S3 Transfer Acceleration would be the correct choice.
Why candidates choose this
Candidates may think 'acceleration' implies faster content delivery globally, confusing it with a CDN service, and overlook that it only optimizes uploads to S3, not downloads for users.
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?”
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.