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Category: Networking
Type: Question
Author: Arnold Ortiz
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What is the meaning of DNS and why and when is it used? I know this name is used very widely. That is why , I wanted to 

know the detail about it. Please explain.

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# Comment Id: 51213

DNS means domain name system.It is used everywhere in the internet and in many private networks. All web page on the World Wide Web accessed by name and not by their IP address uses DNS. Even e-mail uses DNS to send your mail to the destination. You can see DNS every time you load a page in your browser. E-mail uses DNS for routing your mail; routing your mail means sending your mail from your server to the recipient's server. mail server first inspects host portion of the address i.e everything following @. DNS is then used to resolve  mail exchanger record. Finally STMP protocol is used to send this message to IP address of receiving server.