AWS - Security Groups and Network ACLsWhat happens if you do not assign any inbound rules to an AWS security group?AOnly traffic from AWS internal IPs is allowedBAll inbound traffic is allowed by defaultCNo inbound traffic is allowed to the resources associated with the security groupDInbound traffic is allowed only on port 80Check Answer
Step-by-Step SolutionSolution:Step 1: Understand default inbound behavior of security groupsBy default, security groups deny all inbound traffic unless explicitly allowed.Step 2: Analyze the effect of no inbound rulesWith no inbound rules, no inbound traffic can reach the associated resources.Final Answer:No inbound traffic is allowed to the resources associated with the security group -> Option CQuick Check:Default inbound = deny all [OK]Quick Trick: No inbound rules means no inbound traffic allowed [OK]Common Mistakes:Assuming inbound traffic is allowed by defaultConfusing inbound with outbound rulesThinking AWS allows internal traffic automatically
Master "Security Groups and Network ACLs" in AWS9 interactive learning modes - each teaches the same concept differentlyLearnWhyDeepVisualTryChallengeProjectRecallTime
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