howitworksBasicsReel #33 · 4 Nov 2026
Kya ho agar DNS 24 ghante gayab ho jaaye?
DNS (Domain Name System) domain naam ko IP address mein badalta hai. Lookup: browser/OS cache, phir recursive resolver (aksar ISP ka); resolver ke paas nahi ho toh root server, phir TLD (.com) server, phir domain ka authoritative nameserver. Jawab TTL (seconds) tak cache hota hai. DNS na ho toh servers chal rahe hote hain par naam se nahi milte; IP address se site khul sakti hai (HTTPS certificate warnings ke saath bhi). Video ka scenario satire hai.
Links
Aaj ye karo
- IP aur TTL dekho: dig google.com (ANSWER section).
- Mac/Linux par dig na ho toh: nslookup google.com.
- Poora raasta dekho: dig +trace google.com (root se .com se Google tak).
- Alag resolver try karo: dig @1.1.1.1 google.com.
dig google.comdig +trace google.comdig @1.1.1.1 google.comnslookup google.comSources
MDN Web Docs, IETF RFC 1034; 4 Nov 2026 ko check kiya.