A-Records (Host address)
The A-record is the most basic and the most commonly used DNS record type.
It is used to translate human friendly domain names such as "www.example.com" into IP-addresses such as 22.214.171.124 (machine friendly numbers).
A-records are the DNS server equivalent of the hosts file - a simple domain name to IP-address mapping.
A-records are not required for all computers, but are needed for any computer that provides shared resources on a network.
To create a new A-record, right-click a zone in the left list of DNS Records window, and select "New A-record" from the pop-up menu.
This record type is defined in RFC1035.
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