If you’ re unable to connect via SSH to your EC2 instance, which of the following should you check and possibly correct to restore connectivity?

If you’ re unable to connect via SSH to your EC2 instance, which of the following should you check and possibly correct to restore connectivity?
A .  Adjust Security Group to permit egress traffic over TCP port 443 from your I
C . Configure the JAM role to permit changes to security group settings.
D . Modify the instance security group to allow ingress of ICMP packets from your I
F . Adjust the instance’s Security Group to permit ingress traffic over port 22 from your I
H . Apply the most recently released Operating System security patches.

View Answer

Answer: D

Explanation:

http://docs.aws.amazon.com/cli/latest/reference/ec2/authorize-security-group-ingress.htmI