CLF-C02 Cloud Technology and Services Practice Question
A company runs a multiplayer gaming application on Amazon EC2 instances in the us-east-1 Region. The application uses the UDP protocol for real-time communication between players and game servers. Players in Asia and Europe report high latency and packet loss. The company wants to improve performance by directing player traffic from the nearest edge location to the application over the AWS global network, without modifying the application code. Which AWS service should the company use?
⚠ Common exam trap
Watch out — candidates often confuse CloudFront's edge caching with Global Accelerator's network path optimization, but CloudFront does not support UDP and cannot accelerate non-HTTP traffic without application changes.
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 Global Accelerator
AWS Global Accelerator uses the AWS global network to route UDP traffic from the nearest edge location to the application, reducing latency and packet loss without requiring code changes. It leverages Anycast IP addresses to direct player traffic to the closest edge location, then transports it over the optimized AWS backbone to the EC2 instances in us-east-1.
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 it's wrong here
Amazon CloudFront is a content delivery network (CDN) for fast delivery of static and dynamic web content over HTTP/HTTPS. It does not natively support UDP traffic, which is required by this application. CloudFront is best for caching and accelerating web-based content, not real-time UDP-based game traffic.
When this WOULD be correct
A company wants to deliver static or dynamic web content (e.g., videos, APIs) with low latency and high transfer speeds to global users, using HTTP/HTTPS protocols, and needs to offload origin servers with caching at edge locations.
- ✓
AWS Global Accelerator
Why this is correct
AWS Global Accelerator uses the AWS global network to improve the performance of TCP/UDP applications. It directs user traffic to the nearest edge location and then routes it over the AWS global backbone to the optimal regional endpoint, reducing latency and packet loss. This matches the requirement for UDP-based gaming application without application changes.
- ✗
Amazon Route 53 latency routing
Why it's wrong here
Amazon Route 53 latency routing is a DNS-based routing policy that directs users to the AWS region with the lowest latency based on DNS resolution. While it can help route players to a nearby region, it does not provide edge-based acceleration or improve the performance of traffic routed to a single region. It also does not reduce latency over the last mile or through ISP networks.
When this WOULD be correct
A company wants to route users to the nearest healthy application endpoint based on latency, and the application can handle multiple IP addresses (e.g., via client-side logic). For example, a web application using HTTP/HTTPS where DNS-based routing is sufficient and no static IP is needed.
- ✗
AWS Site-to-Site VPN
Why it's wrong here
AWS Site-to-Site VPN is used to create a secure connection between an on-premises network and AWS VPC. It is not designed to accelerate end-user traffic from the internet or to improve performance for global users accessing a cloud application.
When this WOULD be correct
A company has an on-premises data center with a gaming application and wants to securely connect it to AWS resources (e.g., EC2 instances) over the internet, ensuring encrypted communication for compliance reasons, without using dedicated lines.
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.
✓AWS Global AcceleratorCorrect answer▾
Why this is correct
AWS Global Accelerator uses the AWS global network to improve the performance of TCP/UDP applications. It directs user traffic to the nearest edge location and then routes it over the AWS global backbone to the optimal regional endpoint, reducing latency and packet loss. This matches the requirement for UDP-based gaming application without application changes.
✗Amazon CloudFrontWrong answer — click to see why▾
Why this is wrong here
Amazon CloudFront is a content delivery network (CDN) optimized for HTTP/HTTPS traffic and does not support UDP protocols, which are required for the gaming application's real-time communication.
★ When this WOULD be the correct answer
A company wants to deliver static or dynamic web content (e.g., videos, APIs) with low latency and high transfer speeds to global users, using HTTP/HTTPS protocols, and needs to offload origin servers with caching at edge locations.
Why candidates choose this
Candidates may assume CloudFront's global edge locations can accelerate any traffic, overlooking that it only supports TCP-based protocols (HTTP/HTTPS) and not UDP, which is essential for real-time gaming.
✗Amazon Route 53 latency routingWrong answer — click to see why▾
Why this is wrong here
Amazon Route 53 latency routing directs traffic based on DNS resolution, but it does not provide a static IP or optimize the network path over the AWS global network for UDP traffic. It also requires application code changes to handle multiple IP addresses and does not address packet loss or high latency for real-time UDP gaming.
★ When this WOULD be the correct answer
A company wants to route users to the nearest healthy application endpoint based on latency, and the application can handle multiple IP addresses (e.g., via client-side logic). For example, a web application using HTTP/HTTPS where DNS-based routing is sufficient and no static IP is needed.
Why candidates choose this
Candidates may think latency-based DNS routing can improve performance for global users, but they overlook that Route 53 does not optimize the network path or provide a fixed entry point, and it is less effective for real-time UDP traffic where packet loss and jitter are critical.
✗AWS Site-to-Site VPNWrong answer — click to see why▾
Why this is wrong here
AWS Site-to-Site VPN creates an encrypted tunnel between on-premises networks and AWS VPCs, but it does not provide global edge acceleration for UDP traffic or route players to the nearest edge location. It also requires modifying network configurations, not application code, but it doesn't address latency and packet loss for global users.
★ When this WOULD be the correct answer
A company has an on-premises data center with a gaming application and wants to securely connect it to AWS resources (e.g., EC2 instances) over the internet, ensuring encrypted communication for compliance reasons, without using dedicated lines.
Why candidates choose this
Candidates might think a VPN can reduce latency by creating a direct path, but VPNs are for secure connectivity, not global acceleration, and they don't optimize routing for UDP traffic from multiple global regions.
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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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.