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Which of the following best describes the function of a Network ACL in an AWS VPC?

easy📝 Conceptual Q1 of 15
AWS - Security Groups and Network ACLs
Which of the following best describes the function of a Network ACL in an AWS VPC?
AIt acts as a stateless firewall controlling traffic at the subnet level
BIt manages user permissions for AWS resources
CIt routes traffic between different VPCs
DIt encrypts data in transit within the VPC
Step-by-Step Solution
Solution:

  1. Step 1: Understand Network ACL role

    Network ACLs are stateless firewalls that control inbound and outbound traffic at the subnet level.

  2. Step 2: Eliminate other options

    Managing user permissions is IAM's role, routing is done by route tables, and encryption is handled by other services.

  3. Final Answer:

    It acts as a stateless firewall controlling traffic at the subnet level -> Option A

  4. Quick Check:

    Network ACL = subnet-level stateless firewall [OK]
Quick Trick: Network ACLs filter subnet traffic without state tracking [OK]
Common Mistakes:
  • Confusing Network ACLs with Security Groups
  • Thinking Network ACLs manage user permissions
  • Assuming Network ACLs perform routing

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