The Domain Name System (DNS) is a collection of computers called DNS servers that keep track of what IP address is assigned to what Web site or domain name.
A domain name identifies one or more IP addresses used to identify a Web site. For example, www.cnn.com is a domain name, and it could have multiple IP addresses tied to that name. In other words, it's easier to remember CNN's domain name of www.cnn.com than its IP address of 126.96.36.199.
Your browser can recognize and accept an IP address if you know it.
The DNS translates domain names into IP addresses. Every time you use a domain name, the DNS translates the name into the corresponding IP address. The DNS is a separate network. If one DNS server can't figure out how ...