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AWS Certified Solutions Architect study material · question 358 of 500

A VPC has an IPv6 CIDR block and instances with IPv6 addresses, but IPv6 traffic is not leaving the VPC. What is the likely cause?

  1. IPv6 is only supported in default VPCs
  2. Security groups cannot reference IPv6 addresses
  3. The route tables lack separate routes for IPv6 traffic
  4. IPv6 requires a NAT gateway in every subnet
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Answer: C. The route tables lack separate routes for IPv6 traffic

IPv6 traffic is handled separately from IPv4, so route tables must carry their own IPv6 routes.

Source: How Amazon VPC works (Amazon Web Services) — Access the internet

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