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Which statement about Network ACLs is true?

easy📝 Conceptual Q2 of 15
AWS - Security Groups and Network ACLs
Which statement about Network ACLs is true?
AThey are stateful, remembering previous traffic.
BThey apply rules to individual EC2 instances.
CThey cannot block traffic, only allow it.
DThey evaluate rules in order from lowest to highest number.
Step-by-Step Solution
Solution:

  1. Step 1: Recall Network ACL behavior

    Network ACLs are stateless and evaluate rules by rule number order.

  2. Step 2: Check each option

    They evaluate rules in order from lowest to highest number. correctly states rules are evaluated from lowest to highest number.

  3. Final Answer:

    They evaluate rules in order from lowest to highest number. -> Option D

  4. Quick Check:

    Rule evaluation order = Lowest to highest [OK]
Quick Trick: Network ACL rules run lowest to highest number [OK]
Common Mistakes:
MISTAKES
  • Thinking Network ACLs are stateful
  • Believing rules apply to instances, not subnets
  • Assuming Network ACLs only allow traffic

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