- A
Configure a security group that allows inbound traffic from 0.0.0.0/0.
Why wrong: Security groups control traffic but do not make the ALB internet-facing.
- B
Assign an Elastic IP address to the ALB.
Why wrong: ALB does not support Elastic IP; it gets a public DNS name.
- C
Associate the ALB with private subnets only.
Why wrong: Private subnets do not have internet routes.
- D
Associate the ALB with public subnets that have a route to an Internet Gateway.
Required for internet-facing ALB.
- E
Select 'Internet-facing' as the scheme when creating the ALB.
This designates the ALB as internet-facing.
Question 750 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 that will be accessed over the internet. They want to use an Application Load Balancer (ALB) to distribute traffic across EC2 instances in multiple Availability Zones. Which TWO configurations are required to make the ALB internet-facing? (Choose TWO.)
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
✓
Associate the ALB with public subnets that have a route to an Internet Gateway.
Option D is correct because an internet-facing ALB must be associated with public subnets that have a route to an Internet Gateway (IGW). This ensures the ALB's nodes receive public IP addresses and can accept traffic from the internet. Option E is correct because the scheme must be explicitly set to 'internet-facing' during creation; this determines whether the ALB gets public IP addresses and is reachable from the internet.
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.
- ✗
Configure a security group that allows inbound traffic from 0.0.0.0/0.
Why it's wrong here
Security groups control traffic but do not make the ALB internet-facing.
- ✗
Assign an Elastic IP address to the ALB.
Why it's wrong here
ALB does not support Elastic IP; it gets a public DNS name.
- ✗
Associate the ALB with private subnets only.
Why it's wrong here
Private subnets do not have internet routes.
- ✓
Associate the ALB with public subnets that have a route to an Internet Gateway.
Why this is correct
Required for internet-facing ALB.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Select 'Internet-facing' as the scheme when creating the ALB.
Why this is correct
This designates the ALB as internet-facing.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse security group rules (Option A) or Elastic IP assignment (Option B) with the fundamental requirement of an internet-facing scheme and public subnet association, which are the only two configurations that actually make the ALB internet-facing.
Detailed technical explanation
How to think about this question
When an ALB is created with the 'internet-facing' scheme, AWS automatically assigns each ALB node a public IP address from the subnet's pool, and the nodes are placed behind a managed NAT device that routes traffic through the Internet Gateway. The ALB's DNS name resolves to these public IPs, and the nodes must be in public subnets with a default route (0.0.0.0/0) pointing to an IGW to send responses back to clients. In contrast, an internal ALB uses private IPs and is only reachable within the VPC.
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.
Visual reference
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: Associate the ALB with public subnets that have a route to an Internet Gateway. — Option D is correct because an internet-facing ALB must be associated with public subnets that have a route to an Internet Gateway (IGW). This ensures the ALB's nodes receive public IP addresses and can accept traffic from the internet. Option E is correct because the scheme must be explicitly set to 'internet-facing' during creation; this determines whether the ALB gets public IP addresses and is reachable from the internet.
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
This ANS-C01 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 ANS-C01 exam.
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