Shyam Chakravarthy avatar

when calculating usable IP addresses , why do we always subtract 2?

since AWS uses CIDR instead of Traditional IP classes, Do companies still use class A,B or C today?

Am i charged for leaving a stopped instance running?

If i lose the private key file(.pem) for my EC2 instance, is there a simple way to log back in or am i completely locked out?

If a data center goes down, does AWS automatically move my EC2 instance to another availability zone?

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