Question 440
Which service-to-requirement explanation best fits this situation: A VPC design needs a subnet-level stateless packet filter with allow and deny rules?
Explanation
Correct Answer
Network ACLs operate at subnet boundaries and are stateless, so return traffic must also be allowed. This fits the situation: A VPC design needs a subnet-level stateless packet filter with allow and deny rules.
Incorrect Answers
IAM group: Collects IAM user identities, not network-facility availability. This does not address the need for A VPC design needs a subnet-level stateless packet filter with allow and deny rules. The appropriate Network ACL applies because Network ACLs operate at subnet boundaries and are stateless, so return traffic must also be allowed.
AWS WAF: Filters HTTP(S) web requests by configured rules. This does not address the need for A VPC design needs a subnet-level stateless packet filter with allow and deny rules. The appropriate Network ACL applies because Network ACLs operate at subnet boundaries and are stateless, so return traffic must also be allowed.
Security group: Filters supported resource network traffic using stateful rules. This does not address the need for A VPC design needs a subnet-level stateless packet filter with allow and deny rules. The appropriate Network ACL applies because Network ACLs operate at subnet boundaries and are stateless, so return traffic must also be allowed.