- A
Use Network Load Balancers as endpoints in Global Accelerator.
NLB preserves source IP addresses when used as a Global Accelerator endpoint.
- B
Use VPC endpoints and AWS PrivateLink to route traffic through the Global Accelerator.
Why wrong: PrivateLink is for internal connectivity, not internet-facing.
- C
Use Amazon CloudFront in front of the ALBs with origin protocol policy set to HTTPS.
Why wrong: CloudFront does not provide static IP addresses for the application.
- D
Use Application Load Balancers as endpoints and enable X-Forwarded-For header logging.
Why wrong: Global Accelerator with ALB does not preserve client IP; the ALB sees the accelerator's IP.
Question 1,436 of 1,705
ANS-C01 Network Design Practice Question
This ANS-C01 practice question tests your understanding of network design. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 is deploying a web application across multiple AWS Regions using an Application Load Balancer (ALB) in each Region. The company wants to use AWS Global Accelerator to provide a static IP address and accelerate traffic. The application requires that client IP addresses be preserved in the backend logs. Which configuration should the network engineer 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
✓
Use Network Load Balancers as endpoints in Global Accelerator.
Option A is correct because AWS Global Accelerator preserves the client IP address when using a Network Load Balancer (NLB) as an endpoint. Global Accelerator uses the Proxy Protocol v2 to pass the original client IP to the NLB, which then forwards it to the backend targets. This meets the requirement for client IP preservation in backend logs.
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.
- ✓
Use Network Load Balancers as endpoints in Global Accelerator.
Why this is correct
NLB preserves source IP addresses when used as a Global Accelerator endpoint.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use VPC endpoints and AWS PrivateLink to route traffic through the Global Accelerator.
Why it's wrong here
PrivateLink is for internal connectivity, not internet-facing.
- ✗
Use Amazon CloudFront in front of the ALBs with origin protocol policy set to HTTPS.
Why it's wrong here
CloudFront does not provide static IP addresses for the application.
- ✗
Use Application Load Balancers as endpoints and enable X-Forwarded-For header logging.
Why it's wrong here
Global Accelerator with ALB does not preserve client IP; the ALB sees the accelerator's IP.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume Application Load Balancers can preserve client IPs via X-Forwarded-For headers, but Global Accelerator's architecture changes the source IP at the network layer, making Proxy Protocol with an NLB the only way to preserve the original client IP in the packet itself.
Detailed technical explanation
How to think about this question
Global Accelerator uses the Anycast IP address to route traffic to the nearest edge location, then forwards it over the AWS global network to the endpoint. When using an NLB endpoint, Global Accelerator sends traffic with Proxy Protocol v2, which prepends a header containing the original client IP and port. The NLB must be configured to accept Proxy Protocol, and the backend application must parse this header to log the real client IP, ensuring compliance with audit or security requirements.
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.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Network Load Balancers as endpoints in Global Accelerator. — Option A is correct because AWS Global Accelerator preserves the client IP address when using a Network Load Balancer (NLB) as an endpoint. Global Accelerator uses the Proxy Protocol v2 to pass the original client IP to the NLB, which then forwards it to the backend targets. This meets the requirement for client IP preservation in backend logs.
What should I do if I get this ANS-C01 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: Jul 4, 2026
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