AWS (Amazon Web Services) Certification Practice Exam

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Dive into the AWS Certification Exam with our comprehensive quiz. Challenge yourself with multiple-choice questions designed to mimic the exam format. Each question includes detailed explanations to boost your understanding and help you ace your AWS Certification!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What characterizes a public subnet?

  1. It is isolated from external networks

  2. It can be accessed by the Internet Gateway

  3. It is restricted to internal VPC traffic

  4. It cannot connect to other subnets

The correct answer is: It can be accessed by the Internet Gateway

A public subnet is characterized by its ability to connect to the Internet Gateway, which allows instances in this subnet to communicate directly with the Internet. This connectivity is facilitated by the presence of a route in the subnet's route table that routes internet-bound traffic to the Internet Gateway. When an instance in a public subnet has an Elastic IP address or a public IP address, it can be accessed from the Internet, enabling functionalities such as hosting a web server. The other options pertain to attributes of private subnets or misconceptions about networking in a Virtual Private Cloud (VPC). A public subnet does not isolate itself from external networks; rather, it provides connectivity to them. It is also not limited to internal VPC traffic, as traffic from a public subnet can traverse to and from the Internet. Additionally, a public subnet can connect to other subnets, whether they are public or private, as all subnets within a VPC are capable of communicating with each other by default, provided the necessary routing and security group configurations allow for such communication.