The Name Servers of a domain name point out the DNS servers that deal with its DNS records. The IP address of the web site (A record), the mail server that deals with the emails for a domain (MX records), any text record in free form (TXT record), directing (CNAME record) and so forth are obtained from the DNS servers of the web hosting company and for any domain name to be using them and to be forwarded to their hosting platform, it should have their name servers, or NS records. If you wish to open an Internet site, for instance, and you type the URL, the browser connects to a DNS server, which keeps the NS records for the domain name and the request is then sent to the DNS servers of the hosting company where the A record of the website is obtained, enabling you to see the content from the correct location. Commonly a domain has a couple of name servers that start with NS or DNS as a prefix and the contrast between the two is only visual.