Correct Answer: Network ACL (NACL)
NACLs are the first line of defense at the subnet boundary. If a packet is allowed by the NACL, it then reaches the security group for the individual instance....
Correct Answer
Network ACL (NACL)
Why This Answer Is Correct
NACLs are the first line of defense at the subnet boundary. If a packet is allowed by the NACL, it then reaches the security group for the individual instance.
This question evaluates your knowledge of Network ACLs — a core concept tested in AWS Certified Solutions Architect – Associate (SAA-C03). 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 the 'Default' behavior of a Network ACL created by a user (not the VPC default NACL)?
When configuring a Network ACL to allow web traffic (port 80) to a subnet, what else must be configured for the connection to work correctly?
Can a Network ACL be associated with multiple subnets in the same VPC?