Question

After adding port 443 to a security group, how much time will it take before the changes are applied and the application begins working correctly?

A) Immediately after a reboot of the EC2 instances belonging to that security group
B) Generally, it takes 2-5 minutes for the rules to propagate
C) It will take 60 seconds for the rules to apply to all Availability Zones within the region
D) Changes apply instantly to the security group, and the application should be able to immediately respond to 443 requests

Answer 1

Changes to an AWS security group, such as adding port 443, are applied almost immediately, so an application should respond to requests on that port right after the changes are made.

Step-by-step explanation:

When you add port 443 to a security group in AWS, the changes apply almost immediately. There is no need to reboot the EC2 instances that are associated with the security group for the new rules to take effect. As soon as changes are made to a security group, all the instances associated with that security group will start adhering to the new rules. Therefore, your application should begin correctly responding to requests on port 443 right away, barring any other issues unrelated to security group settings.

After adding port 443 to a security group, the changes may take a few minutes to be fully applied and for the application to begin working correctly. This is because when you update the security group, the changes need to be propagated to the applicable resources, which takes some time.

It is important to note that there may be some variations in the propagation time, but on average, it takes 2-5 minutes for the rules to propagate to the instances in the security group.

The correct answer is B) Generally, it takes 2-5 minutes for the rules to propagate.