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Dharani
Dharani

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DNS resolver

DNS(Domain name system)

1) It converts Domain name -> IP address

Ex domain: WWW. google.com

sub domain : www
second level domain : google
top level domain : .com

2) work flow:
i) root server: it does not know the ip, it undergoes .com servers
ii) Tld server: it does not know exact ip, ask the server google.com
iii) Sld server: it knows the actual ip, so it returns the ip address of what we have searched.

3) simple flow diagram:
user-> root -> tld(.com) -> sld(google.com) -> ip address

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