DNS Lookup Explained: How the Internet Finds Websites
What happens when you type youtube.com into your browser? Before your browser can load a website, it first needs to find the IP address behind the domain name. That process is called a DNS lookup. In this video, we explain DNS in a simple and visual way. You will learn how your browser checks cache, how a recursive resolver works, how root servers, TLD servers, and authoritative DNS servers help find the final answer, and how DNS records like A, AAAA, CNAME, MX, and TXT records work. We also cover TTL, DNS providers like Cloudflare DNS, Amazon Route 53, DigitalOcean DNS, and Google Cloud DNS, and why DNS is important for performance, reliability, scalability, and availability. By the end, you will clearly understand one simple idea: You type a domain name. DNS finds the IP address. Then your browser knows where to go. Topics covered: What is DNS? What is a DNS lookup? Browser cache and OS cache Recursive DNS resolver Root DNS server TLD DNS server Authoritative DNS server A record, AAAA record, CNAME, MX, TXT TTL explained DNS providers DNS and CDN basics How a domain connects to a server #DNS #Networking #SystemDesign #WebDevelopment #Internet
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