DNS Servers
DNS servers are the phonebook for domain names. They map human readable names to actual IP.
Any request to DNS goes through following sequence:
Browser request for a website.
Request goes to DNS Resolver or DNS recursive resolver.
It checks its cache first and return the IP if found.
Else it passed the TLD Top Level Domain Server address based on extention in name eg. .com, .net, .org etc.
Then TLD server based on domain, passes request to Authorative servers to get the actual IP. Authorative server main the list when we bought a domain name.
DNS resolver cached the result back from request and return the IP of request.
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