What is DNS?

DNS (Domain Name System) is like the internet's phone book. It translates human-friendly domain names (like google.com) into IP addresses (like 142.250.191.14) that computers use to connect. You don't need to remember numbers — just type the name!

How It Works:

1. You type a domain name (e.g., example.com)
2. Your computer asks a DNS server: "What's the IP for example.com?"
3. DNS server responds with the IP address
4. Your computer connects to that IP

DNS Hierarchy:

• Root servers: Top of the DNS tree
• TLD servers: Handle .com, .org, etc.
• Authoritative servers: Know the actual IP addresses
• Recursive resolvers: Your ISP's DNS servers

Why It Matters:

• Human-friendly: Remember names, not numbers
• Flexibility: Change IP addresses without changing domain names
• Load distribution: One domain can point to multiple IPs
• Essential: The internet wouldn't work without it