Most people think they understand DNS.

“It translates domain names to IP addresses.”

That sentence is useless.

Because when you’re in an interview, and they ask you how it works, you freeze.

Here’s the truth:

DNS isn’t magic. It’s just a chain of simple steps:

• Check local file

• Check cache

• Ask resolver

• Root → TLD → authoritative

• Get IP → connect

That’s it.

If you can explain this clearly, you’re already ahead of 90% of candidates.

If not… you’re still guessing.

I broke it down step by step here: