https://www.youtube.com/watch?v=JkEYOt08-rU [BEST DNS Video]
Domain Registrar knows which same Set of "Name Servers" your domain points to
Remove current NS and Update NS. It takes max 24 hours before these changes are effective
Recursive Resolver is Provided by ISP - Internet Service Provider (Tata Sky Broadband, Airtel, Jio)
How does TLD Name Server Knows - Which Authoritative Name Server has actual - Ip Adress Mapping
Because Website Owner(Hosting Provider) configures list of "Authoritative Name Servers" with Domain Registrar
Domain Registrar updates this info with TLD Server- Top Level Domain Name Server
This process usually takes 24 Hours
Who operates them? ROOT NAME Servers
The root servers are operated by 12 different organizations:
- A VeriSign Global Registry Services
- B University of Southern California, Information Sciences Institute
- C Cogent Communications
- D University of Maryland
- E NASA Ames Research Center
- F Internet Systems Consortium, Inc.
- G US DoD Network Information Center
- H US Army Research Lab
- I Netnod
- J VeriSign Global Registry Services
- K RIPE NCC
- L ICANN
- M WIDE Project
Many of these organizations have been operating root servers since the creation of the DNS. The list shows the Internet’s early roots as a US-based research and military network.
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