Correct Answer: It denies all inbound and outbound traffic until rules are added
User-defined NACLs start as 'Deny All', whereas the default VPC NACL starts as 'Allow All'....
Correct Answer
It denies all inbound and outbound traffic until rules are added
Why This Answer Is Correct
User-defined NACLs start as 'Deny All', whereas the default VPC NACL starts as 'Allow All'.
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?
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?
Which security layer acts as a 'second line of defense' at the subnet level in an AWS VPC?