This DVA-C02 practice question tests your understanding of security. 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.
Which THREE components are required to enable encryption in transit for an Application Load Balancer? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A security group rule allowing inbound traffic on port 443
A security group rule allowing inbound traffic on port 443 is required because the Application Load Balancer (ALB) must accept HTTPS traffic from clients. Without this rule, the ALB's network interface will drop encrypted connections, preventing any TLS handshake from completing. This ensures that traffic between clients and the ALB is encrypted in transit.
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.
✓
A security group rule allowing inbound traffic on port 443
Read the scenario before looking for a memorised answer.
✗
Server Name Indication (SNI) support
Why it's wrong here
SNI is only needed if hosting multiple TLS certificates on the same ALB.
✗
An HTTP to HTTPS redirect rule
Why it's wrong here
Redirect is optional; encryption can be enforced without redirect.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse optional features like SNI or redirect rules as mandatory requirements, when in fact only the security group rule, the certificate, and the listener on port 443 are strictly necessary for encryption in transit.
Detailed technical explanation
How to think about this question
Under the hood, the ALB terminates TLS at the listener level, decrypting traffic using the SSL/TLS certificate and then forwarding plaintext HTTP to targets (unless re-encryption is configured). The security group rule on port 443 must allow TCP traffic for the TLS handshake (which uses TCP port 443) to succeed; without it, the ALB cannot establish the encrypted session. In real-world scenarios, failing to open port 443 in the security group is a common misconfiguration that leads to 'connection refused' errors even when the certificate and listener are correctly set up.
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.
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
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
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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A security group rule allowing inbound traffic on port 443 — A security group rule allowing inbound traffic on port 443 is required because the Application Load Balancer (ALB) must accept HTTPS traffic from clients. Without this rule, the ALB's network interface will drop encrypted connections, preventing any TLS handshake from completing. This ensures that traffic between clients and the ALB is encrypted in transit.
What should I do if I get this DVA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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