Why two name servers ns1.domain.com and ns2.domain.com?

If you are a newbie in web hosting, you always get this doubt why should we use two nameservers and when you ping it points to only one IP address. The answer is quite simple. One is a primary server and the second one is secondary. Please note that it is a fail over mechanism for Name Servers and not for your web server. ie. If your mail server or web server fails, your service will be interrupted.

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