The answer is to create an HTTPS listener on the ALB with a certificate from AWS Certificate Manager and redirect HTTP to HTTPS. This configuration is correct because the Application Load Balancer handles SSL/TLS termination natively using ACM certificates, encrypting all data in transit between clients and the load balancer without altering the existing deployment pipeline. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of how to secure application traffic at the network layer while preserving CI/CD workflows—a common trap is overcomplicating the solution with services like CloudFront or WAF, which add unnecessary architectural changes or fail to address encryption directly. Remember that for ALB-based encryption, ACM is the simplest and most pipeline-friendly choice. A helpful memory tip: ALB + ACM = HTTPS encryption without pipeline disruption.
DOP-C02 Security and Compliance Practice Question
This DOP-C02 practice question tests your understanding of security and compliance. 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 uses AWS CodePipeline to deploy a web application. The deployment includes an EC2 instance running behind an Application Load Balancer. The security team requires that all data in transit to the application be encrypted. Which configuration best meets this requirement without breaking the deployment?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create an HTTPS listener on the ALB with a certificate from AWS Certificate Manager and redirect HTTP to HTTPS.
Option C is correct because the Application Load Balancer supports SSL/TLS termination using certificates from AWS Certificate Manager, enabling HTTPS encryption. Option A is wrong because CodePipeline does not encrypt traffic at the ALB level. Option B is wrong because AWS WAF is a web application firewall, not for encryption. Option D is wrong because CloudFront can handle HTTPS, but adding it changes the architecture unnecessarily and may break the pipeline if not properly configured.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Configure CodePipeline to use an encrypted artifact bucket.
Why it's wrong here
Encrypting artifacts does not encrypt traffic between clients and the application.
✗
Enable AWS WAF on the ALB to enforce HTTPS.
Why it's wrong here
AWS WAF does not enforce encryption; it filters requests.
✓
Create an HTTPS listener on the ALB with a certificate from AWS Certificate Manager and redirect HTTP to HTTPS.
Why this is correct
HTTPS listener with ACM certificate provides encryption in transit.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Place a CloudFront distribution in front of the ALB and configure it to require HTTPS.
Why it's wrong here
Adding CloudFront changes the architecture and may cause deployment issues if not planned.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
Security and Compliance — This question tests Security and Compliance — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create an HTTPS listener on the ALB with a certificate from AWS Certificate Manager and redirect HTTP to HTTPS. — Option C is correct because the Application Load Balancer supports SSL/TLS termination using certificates from AWS Certificate Manager, enabling HTTPS encryption. Option A is wrong because CodePipeline does not encrypt traffic at the ALB level. Option B is wrong because AWS WAF is a web application firewall, not for encryption. Option D is wrong because CloudFront can handle HTTPS, but adding it changes the architecture unnecessarily and may break the pipeline if not properly configured.
What should I do if I get this DOP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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