Google Public DNS is a free, global Domain Name System (DNS) resolution service, that you can use as an alternative to your current DNS provider.

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What is the difference between Public DNS and public IP in AWS ec2?

I found that in ec2 there are two things public DNS and public IP ec2-XX-XXX-190-196.ap-southeast-1.compute.amazonaws.com and xx.255.190.196 Both can access through ssh and ping. So ...