This DOP-C02 practice question tests your understanding of security and compliance. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 DevOps team is deploying a web application on EC2 behind an Application Load Balancer. They need to encrypt traffic between the ALB and the EC2 instances. Which action should they take?
Configure the ALB to use HTTPS with a certificate and the target group to use HTTPS.
Encrypts traffic from ALB to instances.
Configure security group to allow only HTTPS.
Why wrong: Security groups are stateless and don't encrypt traffic.
Install a certificate on the ALB and use HTTP.
Why wrong: HTTP is not encrypted.
Enable encryption in transit on the ALB.
Why wrong: ALB can terminate HTTPS but not automatically encrypt backend traffic.
Answer choices
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 to use HTTPS with a certificate and the target group to use HTTPS.
Option D is correct because the ALB can terminate HTTPS and re-encrypt traffic to instances using HTTPS. Option A is wrong because the ALB does not automatically encrypt traffic to instances. Option B is wrong because installing a certificate on the ALB alone does not encrypt backend traffic. Option C is wrong because security groups do not encrypt traffic.
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
For each option: why learners choose it and why it is or isn't the right answer here.
Configure the ALB to use HTTPS with a certificate and the target group to use HTTPS.
Why this is correct
Encrypts traffic from ALB to instances.
Related concept
Static NAT maps one inside address to one outside address.
Configure security group to allow only HTTPS.
Why it's wrong here
Security groups are stateless and don't encrypt traffic.
Install a certificate on the ALB and use HTTP.
Why it's wrong here
HTTP is not encrypted.
Enable encryption in transit on the ALB.
Why it's wrong here
ALB can terminate HTTPS but not automatically encrypt backend traffic.
Common exam traps
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
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.
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
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
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.
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FAQ
Security and Compliance — This question tests Security and Compliance — Static NAT maps one inside address to one outside address..
The correct answer is: Configure the ALB to use HTTPS with a certificate and the target group to use HTTPS. — Option D is correct because the ALB can terminate HTTPS and re-encrypt traffic to instances using HTTPS. Option A is wrong because the ALB does not automatically encrypt traffic to instances. Option B is wrong because installing a certificate on the ALB alone does not encrypt backend traffic. Option C is wrong because security groups do not encrypt traffic.
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.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
This DOP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DOP-C02 exam.
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