Correct Answer: Security Groups are applied to instances, whereas NACLs are applied to subnets
This is the most fundamental distinction between the two firewall layers in a VPC....
Correct Answer
Security Groups are applied to instances, whereas NACLs are applied to subnets
Why This Answer Is Correct
This is the most fundamental distinction between the two firewall layers in a VPC.
This question evaluates your knowledge of Network ACLs — a core concept tested in AWS Certified Cloud Practitioner (CLF-C02). Understanding Network ACLs is essential for designing scalable, secure, and cost-effective cloud architectures. Mastery of this topic will help you answer scenario-based questions confidently on exam day.
You need to explicitly deny traffic from a specific IP address to your Amazon EC2 instances. Can Security Groups natively handle explicit deny rules?
You need stateless firewall rules at the subnet level in your Amazon VPC. What should you configure?
What is a Network Access Control List (Network ACL)?
Are Network ACLs 'Stateful' or 'Stateless'?
What is the 'Rule Number' used for in a Network ACL?