The Domain Name System (DNS) is the "telephone directory" of the Internet. It translates domain names that are easy for people to remember (for example, www.google.com) into IP addresses that computers can understand (for example, 216.58.214.14). Thanks to DNS, users can easily access websites without having to memorise complex directories of numbers. This conversion is one of the most fundamental technologies that make the Internet user-friendly. In the same way that a telephone directory matches people's names to numbers, DNS matches domain names to IP addresses, a process that takes seconds.
The working principle of DNS is based on a very systematic structure. When a user types in a web address, the browser first checks whether this address is in the local cache. If not, the query is forwarded to the internet service provider (ISP). The ISP's DNS server starts a journey to the root DNS servers to resolve the domain name. In the process, the IP address to which the domain name corresponds is determined and a connection is created that directs the user to the correct server. All these processes are completed in milliseconds, providing users with a fast and uninterrupted experience. Choosing a reliable DNS service is of great importance for internet speed and security.