(B16) Windows server part12 DNS server ,How DNS works internet

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DNS – Domain Name System
Port No: 53

Map Name to IP address
DNS provide IP address for a Name(Domain name, fdqn,url)

open www.google.com in webbrowser, we dont know ip address of www.google.com
request goes to DNS server , DNS server returns ip address of www.google.com
then we commnunicate to www.google.com with the ip address

Ex. DNS explain – with mobile phone contact list
Priyanka –phone no

contact list
name – phone no

open contacts – select name – call

call goes with Number
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all comminucations with ip address only
we dont know ip addresses of device, domains .. request goes to dns server , it returns ip address to client
we can communicate with ip address
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ipconfig /displaydns

ipconfig /flushdns –remove cache dns
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win:
C:WindowsSystem32Driversetchosts

hosts file

ip address hostname or fdqn
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13 root DNS server – ICANN , IANA

. root

A
B
C
D
E
F
G
H
I
J
K
L
M
———
technet.microsoft.com.

Top level domain
.com
.org
.net
.edu
.in
.online
.tv
.cloud
.shop
.biz
..
Secondary level domain

google.com
facebook.com
microsoft.com
google.in

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DNS Cache Server
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source

by Latif Shaik

windows server dns forwarder