An EC2 Instance has been set up in AWS. A software was successfully downloaded and installed on the EC2 Instance. This software uses IPv6 for communication. After the software was installed, and you were trying to access the software via IPv6 on port 80, you could not do so. What needs to be done to alleviate this issue?

Answer options:

A.Add an inbound rule to your security group that allows inbound traffic on port 80 for ::/0.
B.Add an internet gateway for instance.
C.Add an inbound rule to your security group that allows inbound traffic on port 80 for 0.0.0.0/0.
D.Add an egress-only internet gateway.

Answer – A
Since the application works on IPv6, you need to ensure that the port is open for all Ipv6 addresses as ::/0
Options B and C are incorrect since the instance can already download updates that mean there is a connection to the internet and the rules for IPv4 are in place.
Option D is invalid since there is no restriction mentioned in the question for IPv6.
For more information on security groups, one can visit the below URL
https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_SecurityGroups.html