- A
Use an internal ALB with a TCP listener and a security group that allows only HTTPS.
Why wrong: Security groups do not encrypt traffic.
- B
Use an HTTP listener on the ALB and enable encryption on the security group.
Why wrong: Security groups do not provide encryption.
- C
Use an HTTPS listener on the ALB with a target group that uses HTTPS.
HTTPS provides end-to-end encryption.
- D
Use a TCP listener on the ALB with a target group that uses TCP.
Why wrong: TCP does not provide encryption.
Question 635 of 1,705
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. 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 is deploying a web application across multiple Availability Zones in a VPC. The application tier consists of EC2 instances behind an Application Load Balancer (ALB). The security team requires that all traffic between the ALB and the EC2 instances be encrypted. Which solution meets 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
✓
Use an HTTPS listener on the ALB with a target group that uses HTTPS.
Option C is correct because to encrypt traffic between the Application Load Balancer (ALB) and the EC2 instances, the ALB must use an HTTPS listener and the target group must be configured with the HTTPS protocol. This ensures that the ALB terminates the client’s HTTPS connection and then re-encrypts traffic to the backend instances using TLS, meeting the security team’s requirement for end-to-end encryption.
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.
- ✗
Use an internal ALB with a TCP listener and a security group that allows only HTTPS.
Why it's wrong here
Security groups do not encrypt traffic.
- ✗
Use an HTTP listener on the ALB and enable encryption on the security group.
Why it's wrong here
Security groups do not provide encryption.
- ✓
Use an HTTPS listener on the ALB with a target group that uses HTTPS.
Why this is correct
HTTPS provides end-to-end encryption.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use a TCP listener on the ALB with a target group that uses TCP.
Why it's wrong here
TCP does not provide encryption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume a TCP listener can provide encryption by using a security group, but security groups do not encrypt traffic—they only filter based on IP/port, and TCP listeners do not support TLS termination or re-encryption.
Detailed technical explanation
How to think about this question
When using an HTTPS target group, the ALB initiates a new TLS connection to each backend instance, requiring the instances to have a valid TLS certificate (which can be self-signed if the ALB is configured to trust it). The ALB uses Server Name Indication (SNI) and supports TLS 1.2 and 1.3, and you can enforce specific TLS policies for the backend connection. In a real-world scenario, this is critical for compliance with standards like PCI DSS, which mandates encryption of cardholder data in transit between the load balancer and web servers.
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 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
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use an HTTPS listener on the ALB with a target group that uses HTTPS. — Option C is correct because to encrypt traffic between the Application Load Balancer (ALB) and the EC2 instances, the ALB must use an HTTPS listener and the target group must be configured with the HTTPS protocol. This ensures that the ALB terminates the client’s HTTPS connection and then re-encrypts traffic to the backend instances using TLS, meeting the security team’s requirement for end-to-end encryption.
What should I do if I get this ANS-C01 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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Last reviewed: Jul 4, 2026
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