Quick Answer
The answer is to create a listener for port 8080 on the Application Load Balancer. This is correct because an ALB operates at Layer 7 and supports custom ports by allowing you to define a listener that maps an external port, such as 8080, to a target group. Unlike a Network Load Balancer, the ALB does not require a specific security group rule or a public IP address; it uses a DNS name and you simply add a listener configuration to accept traffic on any TCP port. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this tests your understanding of ALB listener flexibility versus default port restrictions, a common trap where candidates assume you must change the default HTTP/HTTPS ports or assign a public IP. Remember the memory tip: “Listeners are like doors—you can open any port you want, not just the front door.”
This SAP-C02 practice question tests your understanding of accelerate workload migration and modernization. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 that uses TCP on port 8080 to AWS. The application must be accessible from the internet. The company wants to use an Application Load Balancer. What must the company do to ensure the load balancer can accept traffic on port 8080?
Configure the security group to allow inbound traffic on port 80 and 443 only.
Why wrong: The security group can be configured for any port.
Change the ALB's default port to 8080.
Why wrong: ALB does not have a default port; you add listeners.
Assign an Elastic IP address to the ALB.
Why wrong: ALB uses a DNS name, not a static IP.
Create a listener for port 8080 on the ALB.
You can create a listener for any port.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Create a listener for port 8080 on the ALB.
Option D is correct because ALB supports custom ports; you create a listener for port 8080. Option A is wrong because ALB does not require a specific security group port; you can configure any port. Option B is wrong because you cannot change the ALB's default ports; you add a listener. Option C is wrong because ALB itself does not need a public IP; it uses a DNS name.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Configure the security group to allow inbound traffic on port 80 and 443 only.
Why it's wrong here
The security group can be configured for any port.
Change the ALB's default port to 8080.
Why it's wrong here
ALB does not have a default port; you add listeners.
Assign an Elastic IP address to the ALB.
Why it's wrong here
ALB uses a DNS name, not a static IP.
Create a listener for port 8080 on the ALB.
Why this is correct
You can create a listener for any port.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
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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FAQ
Accelerate Workload Migration and Modernization — This question tests Accelerate Workload Migration and Modernization — Read the scenario before looking for a memorised answer..
The correct answer is: Create a listener for port 8080 on the ALB. — Option D is correct because ALB supports custom ports; you create a listener for port 8080. Option A is wrong because ALB does not require a specific security group port; you can configure any port. Option B is wrong because you cannot change the ALB's default ports; you add a listener. Option C is wrong because ALB itself does not need a public IP; it uses a DNS name.
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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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