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Day-30 - DNS — the Domain Name System

 Day-30 - DNS — the Domain Name System 

We explored how DNS translates human-readable names (like google.com) into machine-friendly IP addresses — the true backbone of the internet!

1) Understood how DNS resolution works step-by-step
2) Learned about browser, OS, and ISP-level caching
3) Explored Root, TLD & Authoritative DNS servers
4) Ran nslookup to trace real-world domain lookups
5) Discussed redundancy — how 13 logical root servers handle billions of queries through global anycast networks

Key takeaway:
DNS is more than just name resolution it’s a globally distributed, fault-tolerant system that keeps the internet connected and reliable.

Pro Tip: Use public DNS like Cloudflare (1.1.1.1) or Google (8.8.8.8) for faster and more secure lookups.




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