- A
Amazon Route 53
Why wrong: Amazon Route 53 is a DNS service that can route traffic based on various policies (e.g., latency-based, geolocation). However, it does not provide static IP addresses for the application; the IPs of the underlying resources would still be exposed or change over time, and failover is dependent on DNS propagation delays. This does not meet the requirement for fixed static IPs.
- B
AWS Global Accelerator
AWS Global Accelerator uses the AWS global network to direct traffic to the optimal regional endpoint based on health, latency, and geography. It provides two static anycast IP addresses that remain fixed, and supports TCP and UDP. It automatically performs health checks and failover between endpoints across Regions, meeting all stated requirements.
- C
Amazon CloudFront
Why wrong: Amazon CloudFront is a content delivery network (CDN) primarily used for caching and delivering HTTP/HTTPS content. It does not support UDP protocols and does not provide static IP addresses for the origin application; CloudFront provides a domain name and a set of distributed edge locations. While it can be used for failover scenarios, it is not optimized for general TCP/UDP traffic and does not meet the static IP requirement.
- D
Elastic Load Balancing
Why wrong: Elastic Load Balancing (ELB) is a regional service that distributes traffic across targets within a single AWS Region. It does not provide global static IP addresses (unless using a global accelerator) and cannot automatically route across Regions for failover. ELB alone cannot satisfy the global static IP and cross-Region failover needs.
AWS Global Accelerator: Static IPs and Failover for Global Applications
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 critical web application on Amazon EC2 instances in the us-east-1 Region, with a secondary standby deployment in us-west-2 for disaster recovery. The application requires that user traffic be directed to the nearest healthy endpoint, automatically failover to the secondary region if the primary region becomes unavailable, and the company needs two static IP addresses that remain fixed regardless of infrastructure changes. The application uses TCP and UDP protocols. Which AWS service should the company use to meet these requirements?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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 is the correct choice because it provides two static anycast IP addresses that remain fixed regardless of infrastructure changes, directs traffic to the nearest healthy endpoint using the AWS global network, and supports automatic failover between regions for both TCP and UDP traffic. It also integrates with Network Load Balancers, Application Load Balancers, or EC2 instances to route traffic to the closest healthy endpoint, meeting all stated requirements.
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 Route 53
Why it's wrong here
Amazon Route 53 is a DNS service that can route traffic based on various policies (e.g., latency-based, geolocation). However, it does not provide static IP addresses for the application; the IPs of the underlying resources would still be exposed or change over time, and failover is dependent on DNS propagation delays. This does not meet the requirement for fixed static IPs.
- ✓
AWS Global Accelerator
Why this is correct
AWS Global Accelerator uses the AWS global network to direct traffic to the optimal regional endpoint based on health, latency, and geography. It provides two static anycast IP addresses that remain fixed, and supports TCP and UDP. It automatically performs health checks and failover between endpoints across Regions, meeting all stated requirements.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon CloudFront
Why it's wrong here
Amazon CloudFront is a content delivery network (CDN) primarily used for caching and delivering HTTP/HTTPS content. It does not support UDP protocols and does not provide static IP addresses for the origin application; CloudFront provides a domain name and a set of distributed edge locations. While it can be used for failover scenarios, it is not optimized for general TCP/UDP traffic and does not meet the static IP requirement.
- ✗
Elastic Load Balancing
Why it's wrong here
Elastic Load Balancing (ELB) is a regional service that distributes traffic across targets within a single AWS Region. It does not provide global static IP addresses (unless using a global accelerator) and cannot automatically route across Regions for failover. ELB alone cannot satisfy the global static IP and cross-Region failover needs.
When this WOULD be correct
A company needs to distribute incoming traffic across multiple EC2 instances in a single AWS Region, with health checks and automatic scaling, but does not require global routing, static IPs, or multi-region failover.
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 direct traffic to the optimal regional endpoint based on health, latency, and geography. It provides two static anycast IP addresses that remain fixed, and supports TCP and UDP. It automatically performs health checks and failover between endpoints across Regions, meeting all stated requirements.
✗Amazon Route 53Wrong answer — click to see why▾
Why this is wrong here
Amazon Route 53 provides DNS resolution and routing policies like latency-based or geolocation routing, but it does not provide static IP addresses. Route 53 can direct traffic to endpoints but relies on DNS caching, which can cause delays during failover and does not offer fixed IP addresses.
★ When this WOULD be the correct answer
A company needs to route user traffic to the nearest healthy endpoint based on latency, with automatic failover between regions, and does not require static IP addresses. The application uses HTTP/HTTPS and can tolerate DNS propagation delays.
Why candidates choose this
Candidates may think Route 53's routing policies (e.g., latency-based, failover) meet the requirements, overlooking the need for static IP addresses and the limitations of DNS-based routing for TCP/UDP traffic.
✗Amazon CloudFrontWrong answer — click to see why▾
Why this is wrong here
Amazon CloudFront is a content delivery network (CDN) that caches content at edge locations and does not provide static IP addresses. It also does not support UDP traffic, which is required by the application.
★ When this WOULD be the correct answer
A company needs to deliver static and dynamic web content with low latency and high transfer speeds, using HTTP/HTTPS protocols, and requires DDoS protection. They do not need static IP addresses or UDP support.
Why candidates choose this
Candidates may confuse CloudFront's global edge network with Global Accelerator's anycast IPs, and mistakenly think CloudFront can provide static IPs and handle all protocols including UDP.
✗Elastic Load BalancingWrong answer — click to see why▾
Why this is wrong here
Elastic Load Balancing distributes traffic within a single region and does not provide global traffic management, static IP addresses, or cross-region failover for disaster recovery.
★ When this WOULD be the correct answer
A company needs to distribute incoming traffic across multiple EC2 instances in a single AWS Region, with health checks and automatic scaling, but does not require global routing, static IPs, or multi-region failover.
Why candidates choose this
Candidates may confuse load balancing with global traffic management, assuming ELB can handle cross-region routing and static IPs, but ELB is regional and its IP addresses can change.
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 often confuse DNS-based routing (Route 53) with anycast IP-based routing (Global Accelerator), assuming that DNS can provide static IPs and instant failover, but DNS caching and TTL delays make it unsuitable for the requirement of fixed IPs and rapid failover for both TCP and UDP traffic.
Trap categories for this question
Scenario analysis trap
Amazon CloudFront is a content delivery network (CDN) primarily used for caching and delivering HTTP/HTTPS content. It does not support UDP protocols and does not provide static IP addresses for the origin application; CloudFront provides a domain name and a set of distributed edge locations. While it can be used for failover scenarios, it is not optimized for general TCP/UDP traffic and does not meet the static IP requirement.
Detailed technical explanation
How to think about this question
AWS Global Accelerator uses the Anycast routing principle, where the same static IP address is announced from multiple AWS edge locations, allowing traffic to enter the AWS global network at the closest point. Under the hood, it leverages the AWS backbone to route traffic to the optimal endpoint, and it supports both TCP and UDP protocols at the transport layer, unlike CloudFront which only handles HTTP/HTTPS. In a real-world scenario, if the primary region fails, Global Accelerator automatically shifts traffic to the secondary region within seconds by updating the endpoint health status, ensuring minimal disruption for critical applications.
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 is the correct choice because it provides two static anycast IP addresses that remain fixed regardless of infrastructure changes, directs traffic to the nearest healthy endpoint using the AWS global network, and supports automatic failover between regions for both TCP and UDP traffic. It also integrates with Network Load Balancers, Application Load Balancers, or EC2 instances to route traffic to the closest healthy endpoint, meeting all stated requirements.
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.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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 →
Same concept, more angles
4 more ways this is tested on CLF-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company runs a globally distributed web application on Amazon EC2 instances behind Network Load Balancers in two AWS Regions: us-east-1 and eu-west-1. Users around the world access the application over the internet. The company wants to improve latency for all users by directing each user to the nearest healthy application endpoint. Additionally, the company requires two static IP addresses that clients can use for firewall whitelisting and that do not change even if the underlying infrastructure changes. Which AWS service should the company use?
medium- A.Amazon CloudFront
- ✓ B.AWS Global Accelerator
- C.Amazon Route 53 latency-based routing
- D.AWS Direct Connect
Why B: AWS Global Accelerator is the correct choice because it provides two static anycast IP addresses that serve as fixed entry points, and it directs user traffic to the nearest healthy application endpoint via the AWS global network, reducing latency. Unlike CloudFront, it does not cache content but optimizes TCP/UDP traffic, making it ideal for non-HTTP or dynamic applications behind Network Load Balancers.
Variation 2. A company runs a global gaming application on Amazon EC2 instances behind an Application Load Balancer in the us-east-1 Region. Players in Europe and Asia report high latency and intermittent connection drops. The company wants to improve the application's performance for global users by routing traffic over the AWS global network. The company also needs two static IP addresses that users can whitelist in their firewalls for consistent access, and the solution must provide health checks to automatically route traffic away from unhealthy endpoints. Which AWS service should the company use?
medium- A.Amazon CloudFront
- ✓ B.AWS Global Accelerator
- C.AWS WAF
- D.Amazon Route 53
Why B: AWS Global Accelerator is correct because it uses the AWS global network to route traffic from users to the application, reducing latency and jitter by avoiding the public internet. It provides two static anycast IP addresses that remain consistent for firewall whitelisting, and it integrates with health checks to automatically reroute traffic away from unhealthy EC2 endpoints behind the Application Load Balancer.
Variation 3. 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?
medium- A.Amazon CloudFront
- ✓ B.AWS Global Accelerator
- C.Amazon Route 53 latency routing
- D.AWS Site-to-Site VPN
Why B: 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.
Variation 4. A company hosts a web application on Amazon EC2 instances in two AWS Regions: us-east-1 and eu-west-1. The application serves a global user base. The company wants to improve performance by directing users to the nearest healthy regional endpoint with minimal latency. Additionally, the company requires two static Anycast IP addresses that remain constant, representing the application entry point. The solution should automatically reroute traffic if a regional endpoint becomes unhealthy. Which AWS service should the company use?
medium- ✓ A.AWS Global Accelerator
- B.Amazon CloudFront
- C.Amazon Route 53
- D.AWS Shield
Why A: AWS Global Accelerator is correct because it uses the AWS global network and Anycast static IP addresses to route user traffic to the nearest healthy regional endpoint (EC2 instances in us-east-1 or eu-west-1). It automatically reroutes traffic if an endpoint becomes unhealthy, providing low latency and high availability for global users.
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Last reviewed: Jun 11, 2026
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