DNS Deep Dive — A, AAAA, CNAME, MX, TXT Records
Understand how DNS translates domain names to servers, and learn what each record type does with practical examples.
Every time you type a URL into your browser, something remarkable happens before the page even starts loading. Your computer needs to figure out which server to talk to. You typed myapp.com, but the internet runs on IP addresses — numbers like 76.76.21.21. Something needs to translate between the two.
That something is DNS — the Domain Name System. It's the phonebook of the internet. You look up a name, it gives you a number, and then you can make the call.
DNS is one of those things you can ignore completely when everything works and need to understand deeply when something doesn't. A misconfigured DNS record can make your entire site unreachable, send your email to the wrong server, or break your SSL certificate. Understanding DNS records saves you hours of confusion and prevents
This lesson is part of the Guild Member curriculum. Plans start at $29/mo.