ANS-C01 Network Implementation Practice Question

A company has a VPC with an IPv4 CIDR block of 10.0.0.0/16. They need to add an IPv6 CIDR block and ensure that traffic from the internet to the IPv6-enabled resources is allowed. Which configuration is required?

⚠ Common exam trap

Many exam-takers confuse the internet gateway's role with NAT or VPN devices, assuming IPv6 requires a separate gateway or translation mechanism, when in fact the internet gateway natively handles IPv6 with proper route table entries.

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

✓

Attach an internet gateway and update route tables for IPv6.

To enable IPv6 communication from the internet to resources in a VPC, you must associate an IPv6 CIDR block with the VPC, attach an internet gateway, and update the route tables to include a default route (::/0) pointing to the internet gateway for IPv6 traffic. Option B correctly describes this configuration, as the internet gateway handles both IPv4 and IPv6 traffic, and route tables must be explicitly updated for IPv6.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
Attach a NAT gateway to the VPC and update route tables.
Why it's wrong here
NAT gateway is for IPv4 outbound.
✓
Attach an internet gateway and update route tables for IPv6.
Why this is correct
IGW supports IPv6 traffic.
✗
Create a Virtual Private Gateway and attach the VPC.
Why it's wrong here
VPG is for hybrid connectivity.
✗
Create a Transit Gateway and attach the VPC.
Why it's wrong here
TGW is for internal routing.

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ANS-C01 Network Implementation Practice Question

Why each option matters

Option-by-option breakdown

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