How DNS Actually Works — From URL to IP Address in Under 100ms

Every time you load a website, a hidden chain of servers races to find its address in under 100 milliseconds. Here's exactly how DNS works, step by step. 00:00 The invisible system behind every website 00:09 What is DNS? (and why computers need it) 00:27 Browser & OS cache — the first check 00:55 The full resolution chain: Resolver → Root → TLD → Authoritative server 01:39 DNS record types: A, AAAA, CNAME, MX, TXT 02:01 TTL explained + DNS over HTTPS/TLS (privacy & security) 02:34 Recap DNS (Domain Name System) is the internet's phonebook — it translates human-readable domain names like example.com into machine-readable IP addresses like 93.184.216.34. This video breaks down the real lookup process: browser cache, OS cache, recursive resolvers, root servers, TLD servers, and authoritative name servers, plus the record types (A, AAAA, CNAME, MX, TXT), TTL caching, and why DNS over HTTPS / DNS over TLS exist. If you found this helpful, follow for more quick breakdowns of how the internet actually works. #DNS #Networking #HowTheInternetWorks