The Domain Name System (DNS) is a hierarchical system that provides the IP addresses that correspond to a given Fully Qualified Domain Name (FQDN, often called a hostname or domain name). At the top of the tree structure are thirteen “root” Domain Name Servers that have the primary and secondary IP addresses of the DNS Authorities for all domains on the Internet.

This white paper provides a brief introduction into how DNS works and how to establish Internet redundancy when utilizing the PowerLink as the DNS authoritative server.