- A
Use a Network Load Balancer with TLS listeners and target groups.
Why wrong: Incorrect. A Network Load Balancer (NLB) with TLS listeners does not provide a security policy to enforce specific TLS versions and ciphers; it only supports basic TLS termination. ALB offers predefined security policies for granular control.
- B
Place a CloudFront distribution in front of the ALB and configure the origin protocol policy.
Why wrong: Incorrect. CloudFront is used for content delivery and caching; it can be placed in front of an ALB, but its origin protocol policy only controls encryption between CloudFront and the ALB, not the overall TLS version and cipher enforcement. This approach is less efficient and adds latency.
- C
Install a self-signed certificate on each EC2 instance and configure the web server.
Why wrong: Incorrect. Installing self-signed certificates on each EC2 instance is inefficient and hard to manage at scale. It does not provide centralized enforcement of TLS 1.2 and specific ciphers across all traffic.
- D
Configure the ALB with a security policy that enforces TLS 1.2 and the required ciphers.
Correct. Application Load Balancer (ALB) supports predefined security policies that allow you to enforce TLS 1.2 or higher and specific cipher suites. This provides centralized, efficient control without modifying instances.
DOP-C02 ALB Security Policy Practice Question
This DOP-C02 practice question tests your understanding of resilient cloud 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. A key principle to apply: aLB Security Policy. 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.
An organization runs a critical application on Amazon EC2 instances in an Auto Scaling group behind an Application Load Balancer. The application requires that all traffic be encrypted in transit. The security team mandates the use of TLS 1.2 or higher and specific ciphers. What is the MOST efficient way to enforce this requirement?
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
Configure the ALB with a security policy that enforces TLS 1.2 and the required ciphers.
The Application Load Balancer (ALB) supports predefined security policies that enforce TLS version and cipher requirements at the load balancer level, providing centralized control. Option D is correct because configuring the ALB with a security policy that mandates TLS 1.2 and specific ciphers meets the requirement efficiently without modifying individual instances. Option A is incorrect because a Network Load Balancer (NLB) with TLS listeners does not offer the same granular security policy options as ALB and is less efficient for this requirement. Option B is incorrect because CloudFront is a CDN service; placing it in front of the ALB does not directly enforce TLS settings on the ALB itself and adds unnecessary complexity. Option C is incorrect because installing self-signed certificates on each EC2 instance is inefficient, not centralized, and does not enforce consistent TLS version and cipher requirements across all traffic.
Key principle: ALB Security Policy
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 a Network Load Balancer with TLS listeners and target groups.
Why it's wrong here
Incorrect. A Network Load Balancer (NLB) with TLS listeners does not provide a security policy to enforce specific TLS versions and ciphers; it only supports basic TLS termination. ALB offers predefined security policies for granular control.
- ✗
Place a CloudFront distribution in front of the ALB and configure the origin protocol policy.
Why it's wrong here
Incorrect. CloudFront is used for content delivery and caching; it can be placed in front of an ALB, but its origin protocol policy only controls encryption between CloudFront and the ALB, not the overall TLS version and cipher enforcement. This approach is less efficient and adds latency.
- ✗
Install a self-signed certificate on each EC2 instance and configure the web server.
Why it's wrong here
Incorrect. Installing self-signed certificates on each EC2 instance is inefficient and hard to manage at scale. It does not provide centralized enforcement of TLS 1.2 and specific ciphers across all traffic.
- ✓
Configure the ALB with a security policy that enforces TLS 1.2 and the required ciphers.
Why this is correct
Correct. Application Load Balancer (ALB) supports predefined security policies that allow you to enforce TLS 1.2 or higher and specific cipher suites. This provides centralized, efficient control without modifying instances.
Related concept
ALB Security Policy
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
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- ALB Security Policy
- TLS Termination
- Centralized Enforcement
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
ALB Security Policy
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.
Review aLB Security Policy, then practise related DOP-C02 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Resilient Cloud Solutions — This question tests Resilient Cloud Solutions — ALB Security Policy.
What is the correct answer to this question?
The correct answer is: Configure the ALB with a security policy that enforces TLS 1.2 and the required ciphers. — The Application Load Balancer (ALB) supports predefined security policies that enforce TLS version and cipher requirements at the load balancer level, providing centralized control. Option D is correct because configuring the ALB with a security policy that mandates TLS 1.2 and specific ciphers meets the requirement efficiently without modifying individual instances. Option A is incorrect because a Network Load Balancer (NLB) with TLS listeners does not offer the same granular security policy options as ALB and is less efficient for this requirement. Option B is incorrect because CloudFront is a CDN service; placing it in front of the ALB does not directly enforce TLS settings on the ALB itself and adds unnecessary complexity. Option C is incorrect because installing self-signed certificates on each EC2 instance is inefficient, not centralized, and does not enforce consistent TLS version and cipher requirements across all traffic.
What should I do if I get this DOP-C02 question wrong?
Review aLB Security Policy, then practise related DOP-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
ALB Security Policy
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Last reviewed: Jun 20, 2026
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