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Which of the following is the correct way to allow inbound HTTP traffic on port 80 using a NACL rule?

easy📝 Configuration Q12 of 15
AWS - Security Groups and Network ACLs
Which of the following is the correct way to allow inbound HTTP traffic on port 80 using a NACL rule?
AAllow inbound traffic on port 80 with rule number 100, protocol TCP, action ALLOW
BAllow inbound traffic on port 22 with rule number 100, protocol TCP, action ALLOW
CAllow outbound traffic on port 80 with rule number 100, protocol TCP, action DENY
DAllow inbound traffic on port 443 with rule number 100, protocol UDP, action ALLOW
Step-by-Step Solution
Solution:

  1. Step 1: Identify the correct port and protocol for HTTP

    HTTP uses TCP protocol on port 80.

  2. Step 2: Confirm the rule direction and action

    To allow inbound HTTP traffic, the rule must be inbound with action ALLOW.

  3. Final Answer:

    Allow inbound traffic on port 80 with rule number 100, protocol TCP, action ALLOW -> Option A

  4. Quick Check:

    Inbound TCP port 80 ALLOW = D [OK]
Quick Trick: HTTP uses TCP port 80 inbound ALLOW rule [OK]
Common Mistakes:
MISTAKES
  • Using wrong port number or protocol
  • Setting rule direction incorrectly
  • Using DENY action instead of ALLOW

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