How ISP or dns server find the nameserevr [on hold]

Posted by IT researcher on Pro Webmasters See other posts from Pro Webmasters or by IT researcher
Published on 2013-07-02T14:27:20Z Indexed on 2013/07/02 17:16 UTC
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web-development

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dns

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webserver

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ip-address

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dns-servers

I saw some articles about how DNS propagation happens.I know that ISP or DNS server(such as google public dns) cache the ip address of website which it uses to convert domain name to ip address. But my doubt is from where these ISP or dns serevr know which nameserver to go for particular domain name. for example a domain.com has two name servers ns1.domain.com and ns2.domain.com. But how the ISP server or dns server know that it uses these name server and i have to send request to this name server.So where does this record mainatined?

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