Never be confused about DNS again.
Learn DNS once and for all.
They say you should learn the fundamentals, and the rest will fall into place. DNS is right at the foundation of the internet. Having a clear understanding of DNS will help you configure and debug DNS many times throughout your career.
DNS hasn't changed that much since its introduction in 1983 and it's unlikely to start now. DNS isn't going anywhere. The earlier you learn DNS, the longer you'll benefit.
The great thing about DNS is that all the information is public. You can have perfect clarity if you know where to look.
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