- A
Attach an Elastic IP to each EC2 instance.
Why wrong: Instances behind NLB should not have public IPs; NLB handles traffic.
- B
Assign Elastic IP addresses to the Network Load Balancer.
NLB supports Elastic IP per AZ, providing static IPs.
- C
Configure an Application Load Balancer instead of NLB.
Why wrong: ALB does not support Elastic IP assignment.
- D
Use AWS WAF to allow traffic from the partners' IP ranges.
Why wrong: WAF does not provide static IPs for the NLB.
- E
Use AWS Global Accelerator with the NLB as an endpoint.
Global Accelerator provides two static IPs that route to the NLB.
Question 146 of 1,746
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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 is migrating a legacy application to AWS. The application requires static IP addresses for whitelisting by external partners. The company will use a Network Load Balancer (NLB) to distribute traffic to EC2 instances. Which TWO actions should the company take to provide static IP addresses for the partners to whitelist?
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
✓
Assign Elastic IP addresses to the Network Load Balancer.
Option B is correct because you can assign Elastic IP addresses to the Network Load Balancer per Availability Zone, providing static IPs for external partners to whitelist. Option E is correct because AWS Global Accelerator provides two static IP addresses (or allows you to bring your own) and can be used with an NLB as an endpoint, offering static IPs that partners can whitelist. Option A is incorrect because attaching Elastic IPs to EC2 instances does not provide static IPs for the NLB frontend; the NLB uses its own IPs. Option C is incorrect because an Application Load Balancer (ALB) does not support static IP addresses by default and operates at layer 7, not suitable for this requirement. Option D is incorrect because AWS WAF is a web application firewall that filters traffic based on rules but does not provide static IP addresses for the load balancer.
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.
- ✗
Attach an Elastic IP to each EC2 instance.
Why it's wrong here
Instances behind NLB should not have public IPs; NLB handles traffic.
- ✓
Assign Elastic IP addresses to the Network Load Balancer.
Why this is correct
NLB supports Elastic IP per AZ, providing static IPs.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure an Application Load Balancer instead of NLB.
Why it's wrong here
ALB does not support Elastic IP assignment.
- ✗
Use AWS WAF to allow traffic from the partners' IP ranges.
Why it's wrong here
WAF does not provide static IPs for the NLB.
- ✓
Use AWS Global Accelerator with the NLB as an endpoint.
Why this is correct
Global Accelerator provides two static IPs that route to the NLB.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Visual reference
What to study next
Got this wrong? Here's your next step.
Identify which SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Continuous Improvement for Existing Solutions — study guide chapter
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Assign Elastic IP addresses to the Network Load Balancer. — Option B is correct because you can assign Elastic IP addresses to the Network Load Balancer per Availability Zone, providing static IPs for external partners to whitelist. Option E is correct because AWS Global Accelerator provides two static IP addresses (or allows you to bring your own) and can be used with an NLB as an endpoint, offering static IPs that partners can whitelist. Option A is incorrect because attaching Elastic IPs to EC2 instances does not provide static IPs for the NLB frontend; the NLB uses its own IPs. Option C is incorrect because an Application Load Balancer (ALB) does not support static IP addresses by default and operates at layer 7, not suitable for this requirement. Option D is incorrect because AWS WAF is a web application firewall that filters traffic based on rules but does not provide static IP addresses for the load balancer.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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