The Domain Name System (DNS) is a distributed database, arranged hierarchically, containing records for domain names. The DNS system's main aim is to match a domain name to an IP Address. In order to fulfill this role, the DNS Server contains Resource Records (Records) in a Zone File, which contains the domain name and IP address mappings for computers contained within that Zone. All Resource Records have a Time To Live TTL (TTL), specifying the number of seconds other DNS servers and applications are allowed to cache the Record.
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NS Records identify the DNS servers responsible (authoritative) for a Zone. A Zone should contain one NS Record for each of its own DNS servers (primary and secondary). This mostly is used for Zone Transfer purposes (notify). These NS Records have...
This Record is used to translate a domain name to an IP Address.
An MX Record identifies the email server(s) responsible for a domain name. When sending an email to firstname.lastname@example.org, your email server must first look up the MX Record for xyz.com to see which email server actually handles email...
TXT Records provide the ability to associate some text with a domain or a sub-domain. This text is meant to strictly provide information and has no functionality as such. A TXT Record can store up to 255 characters of free form text. This Record...
The IPv6 Address Record is a much larger address space than that of an IPv4 Address Record. Addresses in IPv6 Address Records are 128 bits long while those in IPv4 Address Records are 32 bits long.
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