Question 1mediummultiple choice
Study the full IPv6 explanation →- A
NAT64
Why wrong: For IPv6 to IPv4 translation.
- B
Egress-Only Internet Gateway
Why wrong: Outbound only.
- C
NAT Gateway
Why wrong: IPv4 only.
- D
Internet Gateway
Supports IPv6 inbound.
Question 1,534 of 1,705
ANS-C01 Network Design Practice Question
This ANS-C01 practice question tests your understanding of network design. 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 has a VPC with both IPv4 and IPv6 CIDR blocks. The application team wants to allow internet traffic to an IPv6-enabled web server. Which resource must be configured?
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
✓
Internet Gateway
An Internet Gateway (IGW) is required to allow inbound and outbound IPv6 traffic between a VPC and the internet. Unlike IPv4, IPv6 addresses in AWS are globally unique by default, so no NAT is needed; the IGW directly routes traffic for both IPv4 and IPv6 when attached to the VPC and associated with the route table.
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.
- ✗
NAT64
Why it's wrong here
For IPv6 to IPv4 translation.
- ✗
Egress-Only Internet Gateway
Why it's wrong here
Outbound only.
- ✗
NAT Gateway
Why it's wrong here
IPv4 only.
- ✓
Internet Gateway
Why this is correct
Supports IPv6 inbound.
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 often confuse the Egress-Only Internet Gateway with a full-duplex gateway, forgetting that it only supports outbound IPv6 traffic and cannot accept inbound connections from the internet.
Detailed technical explanation
How to think about this question
Under the hood, an Internet Gateway performs source/destination network address translation for IPv4 (1-to-1 NAT) but for IPv6 it acts as a simple layer-3 router, forwarding packets without translation because IPv6 addresses are globally routable. In a real-world scenario, if the web server's subnet route table has a default route (0.0.0.0/0 and ::/0) pointing to the IGW, both IPv4 and IPv6 clients can reach the server directly, but security groups and network ACLs must still be configured to allow the desired traffic.
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.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Internet Gateway — An Internet Gateway (IGW) is required to allow inbound and outbound IPv6 traffic between a VPC and the internet. Unlike IPv4, IPv6 addresses in AWS are globally unique by default, so no NAT is needed; the IGW directly routes traffic for both IPv4 and IPv6 when attached to the VPC and associated with the route table.
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: Jun 24, 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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