AWS - Security Groups and Network ACLs
Which AWS component acts as a virtual firewall controlling inbound and outbound traffic at the instance level?
Which AWS component acts as a virtual firewall controlling inbound and outbound traffic at the instance level?
easy📝 Conceptual Q1 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the role of Security Groups
Security Groups act as virtual firewalls that control traffic at the instance level, filtering inbound and outbound traffic.Step 2: Differentiate from Network ACLs
Network ACLs control traffic at the subnet level, not the instance level.Final Answer:
Security Group -> Option BQuick Check:
Instance-level firewall = Security Group [OK]
Quick Trick: Security Groups filter per instance; NACLs filter per subnet [OK]
Common Mistakes:
MISTAKES- Confusing NACLs as instance-level filters
- Thinking route tables control traffic filtering
- Assuming Internet Gateway filters traffic
Master "Security Groups and Network ACLs" in AWS
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