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AWS Certified Solutions Architect study material · question 356 of 500

What must be true of a subnet for it to be called a public subnet?

  1. It has a direct route to an internet gateway
  2. Its instances all have Elastic IP addresses
  3. It has no network ACL attached
  4. It sits in the default VPC
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Answer: A. It has a direct route to an internet gateway

A subnet's type follows from its routing; a private subnet has no such route and needs a NAT device to reach the internet.

Source: Subnets for your VPC (Amazon Web Services) — Subnet types

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