AWS Certified Solutions Architect – Professional — Question 451

Select the correct set of options. These are the initial settings for the default security group:

Answer options

• A. Allow no inbound traffic, Allow all outbound traffic and Allow instances associated with this security group to talk to each other
• B. Allow all inbound traffic, Allow no outbound traffic and Allow instances associated with this security group to talk to each other
• C. Allow no inbound traffic, Allow all outbound traffic and Does NOT allow instances associated with this security group to talk to each other
• D. Allow all inbound traffic, Allow all outbound traffic and Does NOT allow instances associated with this security group to talk to each other

Correct answer: A

Explanation

A default security group is configured to block all inbound traffic from external sources by default, while allowing all outbound traffic. It also includes a default inbound rule that allows traffic from other instances associated with that same security group. Therefore, option A is correct as it accurately outlines these three default behaviors.