A nameserver, also known as a DNS server (Domain Name System server), is a computer system that provides a mapping between domain names and IP addresses. Domain names are human-friendly names used to identify websites or other internet resources, while IP addresses are the unique numerical identifiers that computers use to communicate with each other on the internet.
When a user types a domain name into their web browser, the browser sends a request to a nameserver to translate the domain name into its corresponding IP address. The nameserver looks up the IP address associated with that domain name and returns it to the browser, which then uses the IP address to connect to the website or resource.
Nameservers are an essential part of the internet infrastructure, as they help to ensure that domain names can be easily accessed and used by users all around the world. Without nameservers, users would need to remember and enter IP addresses directly in order to access websites, which would be difficult and impractical for most people.