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How should you configure a security group rule to permit inbound HTTP traffic on port 80?

easy📝 Syntax Q3 of 15
AWS - Security Groups and Network ACLs
How should you configure a security group rule to permit inbound HTTP traffic on port 80?
AProtocol: TCP, Port: 80, Source: 0.0.0.0/0
BProtocol: UDP, Port: 80, Source: 0.0.0.0/0
CProtocol: TCP, Port: 443, Source: 0.0.0.0/0
DProtocol: ICMP, Port: 80, Source: 0.0.0.0/0
Step-by-Step Solution
Solution:

  1. Step 1: Identify HTTP Protocol and Port

    HTTP uses TCP protocol on port 80.

  2. Step 2: Set Source to Allow All

    To allow traffic from anywhere, source should be 0.0.0.0/0.

  3. Final Answer:

    Protocol: TCP, Port: 80, Source: 0.0.0.0/0 -> Option A

  4. Quick Check:

    HTTP uses TCP port 80, not UDP or ICMP [OK]
Quick Trick: HTTP requires TCP port 80 inbound from 0.0.0.0/0 [OK]
Common Mistakes:
  • Using UDP instead of TCP
  • Setting port to 443 (HTTPS)
  • Using ICMP protocol incorrectly

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