Does the EC2-Classic instance become a member of the VPC?
The EC2-Classic instance does not become a member of the VPC. It becomes a member of the VPC Security Group that was associated with the in...

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The EC2-Classic instance does not become a member of the VPC. It becomes a member of the VPC Security Group that was associated with the instance. All the rules and references to the VPC Security Group apply to communication between instances in EC2-Classic instance and resources within the VPC.