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What is the primary purpose of a Network ACL in AWS?

easy📝 Conceptual Q11 of 15
AWS - Security Groups and Network ACLs
What is the primary purpose of a Network ACL in AWS?
ATo monitor application performance
BTo manage user permissions for AWS services
CTo store data securely in the cloud
DTo control inbound and outbound traffic at the subnet level
Step-by-Step Solution
Solution:

  1. Step 1: Understand Network ACL function

    Network ACLs act as a firewall controlling traffic entering and leaving subnets.

  2. Step 2: Identify correct purpose

    They specifically control inbound and outbound traffic at the subnet level, not user permissions or data storage.

  3. Final Answer:

    To control inbound and outbound traffic at the subnet level -> Option D

  4. Quick Check:

    Network ACL = subnet traffic control [OK]
Quick Trick: Network ACLs control subnet traffic, not users or data [OK]
Common Mistakes:
  • Confusing Network ACLs with IAM permissions
  • Thinking Network ACLs store data
  • Assuming Network ACLs monitor performance

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