What is a Security Group?
A.
None of these.
B.
A list of users that can access Amazon EC2 instances.
C.
An Access Control List (ACL) for AWS resources.
D.
A firewall for inbound traffic, built-in around every Amazon EC2 instance.
Explanation:
A security group acts as a virtual firewall for your instance to control inbound and outbound traffic. http://
docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_SecurityGroups.html
Really? It should be C
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D
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Answer is D. ACL is a different aspect of enhancing security at subnet level.
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Answer is D, although, you can modify outbound also.
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