Anatomy of a DNS zone file

Example of a DNS zone file:

$TTL indicates a DNS node tree and the starting point of a DNS zone file and default expiration time of all resource records without their own TTL value which is 1 week in this case.

SOA record – The Start of Authority record is a required option for each zone.

– contains the name of the zone ,

– email address of the entity responsible for administering the domain’s zone file (not used here),

– current serial number of the zone,

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