The Name Servers of a domain name show the DNS servers that manage its DNS records. The Internet protocol address of the website (A record), the mail server that deals with the emails for a domain name (MX records), any text record in free form (TXT record), pointing (CNAME record) and so on are taken from the DNS servers of the web hosting provider and for any Internet domain to be using them and to be forwarded to their hosting platform, it ought to have their name servers, or NS records. If you want to open an Internet site, for example, and you enter the URL, the browser connects to a DNS server, which keeps the NS records for the domain address and the request is then forwarded to the DNS servers of the hosting company where the A record of the web site is obtained, allowing you to view the content from the correct location. Normally a domain name has 2 name servers that start with NS or DNS as a prefix and the contrast between the two is simply visual.