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Authoritative DNS - Establishing Redundancy with the PowerLink Pro Series

White Paper Published By: Astrocom
Astrocom
Published:  Apr 23, 2008
Type:  White Paper
Length:  5 pages

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.