What is DNS in computing

In computing, a DNS is a distributed and hierarchical database capable of storing information associated with domain names on the Internet, easy for people to remember and use, with Internet Protocol (IP) numbers, which is the way in which the machines can be found on the Internet. A DNS is organized in a hierarchy that helps keep things running quickly and smoothly.

DNS operates a client/server network system that sends requests and receives responses from DNS servers. Each request contains a name that results in the corresponding IP address returned by the server. This is known as direct DNS lookups. In addition to direct lookups, DNS can request reverse lookups that query an IP to determine the associated domain name.


DNS is the acronym in English for Domain Name Server which means Domain Name Server .

What is a DNS for?

Domain Name System (DNS) resolves Internet site names to their underlying IP addresses, adding efficiency and even security in the process. For example, when you type a web address like www.cavsi.com, the Internet Service Provider looks up the DNS associated with the domain name and translates it to a machine-friendly IP address like to be the IP for www.cavsi.com. With this the DNS directs the Internet connection to the requested website.


A DNS is important because it looks up the IP addresses of central systems (“hosts”) based on their names. DNS translates all queries to IP addresses, identifying different devices that are connected to the network.

How does DNS work?

When you visit a domain like cavsi.com, your computer goes through a series of steps to convert the human-readable web address to a machine-readable IP address. This happens every time you use a domain name, whether you’re visiting websites, sending email, listening to Internet radio stations, or watching online video.

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