- A
Amazon CloudFront
Why wrong: 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.
- B
AWS Global Accelerator
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.
- C
Amazon Route 53 latency routing
Why wrong: 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.
- D
AWS Site-to-Site VPN
Why wrong: 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.
Quick Answer
The answer is AWS Global Accelerator. This service is the correct choice because it uses the AWS global network to improve UDP gaming latency by directing player traffic from the nearest edge location to your application over the optimized AWS backbone, reducing both latency and packet loss without requiring any code modifications. For the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of how Global Accelerator handles UDP traffic for real-time applications, often appearing as a scenario where you must choose between CloudFront (which primarily optimizes HTTP/HTTPS and TCP) and Global Accelerator (which supports UDP). A common trap is selecting CloudFront because it also uses edge locations, but remember that CloudFront does not natively accelerate UDP traffic. Memory tip: Think "UDP needs a UDP accelerator" — Global Accelerator works with any protocol over TCP or UDP, while CloudFront is for web content.
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 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?
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.
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 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.
- ✓
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.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
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.
- ✗
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that 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.
Detailed technical explanation
How to think about this question
AWS Global Accelerator uses Anycast IP addresses that announce the same IP from multiple edge locations, so player traffic naturally flows to the nearest edge. From there, traffic is forwarded over the AWS global network using the TCP/UDP flow hashing and congestion control optimizations, avoiding the public internet's variability. This is particularly effective for UDP-based gaming because it reduces jitter and packet loss by keeping the traffic on AWS's managed backbone rather than traversing multiple ISP hops.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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: 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.
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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