TYPES OF DOMAIN NAME SERVERS
Multiple types of the domain name servers are present on the Internet, categorized by the role they play. The following sections discuss the different types of domain name servers.
NOTE
The FQHN is not widely used. FQDN, on the other hand, is commonly used both as fully qualified hostname and fully qualified domain name.
The Primary Domain Name Server
Each domain must have a primary (or master) domain name server. This server is registered on the Internet for the domain name to be visible. The primary name server is an authority over a domain or zone. A DNS administrator maintains database files on the primary domain name server. This domain name server is responsible for resolving all hosts in a domain or zone. ...
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