What is a DNS and where is it used?

What is a DNS and where is it used?

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.

What is a DNS and where is it used?

DNS stands for Domain Name System. It maps domain names on the internet to their respective IP addresses and allows websites to use names instead of the hard-to-remember IP addresses which are all numbers. This allows people a more unique way of accessing content on the internet instead of accessing them using the IP address.

For example, to go to the TechyV website, you type on the web browser without quotes “TechyV.com” or “www.techyv.com” instead of entering “104.27.135.15”. Almost all internet activities rely on DNS to immediately give the information so that users can connect to the remote hosts.

Since it is not practical to maintain a single DNS server with complete list of domain name or IP address mappings, DNS is distributed all over the internet in a hierarchy of authority.