An authoritative DNS server is a type of Internet server that responds to queries about a domain name. It stores records related to domains, such as the IP address associated with a particular domain name and the email server associated with it. Configuring an authoritative DNS server is a critical step when setting up a domain name and registering it with a domain name registrar. Having an authoritative DNS server improves the response time and reliability of a domain name, allowing it to function efficiently and securely on the web. Find detailed explanation of Authoritative DNS server.