A name server or host server maintains DNS information for a list of domain names, directing web browsers to the proper address.
Every domain has at least a primary and a secondary name server.
The name server addresses of your web hosting provider are required when registering a domain name at Network Solutions. Each hosting account receives a unique IP address and domain name that points to that address. Every computer connected to the Internet has a unique Internet Protocol number which is the address of that particular machine on the network. A Uniform Resource Locator points to a particular file or document on the Internet. There are a lot of possible variations.