START OF AUTHORITY
\stˈɑːt ɒv ɐθˈɒɹɪtˌi], \stˈɑːt ɒv ɐθˈɒɹɪtˌi], \s_t_ˈɑː_t ɒ_v ɐ_θ_ˈɒ_ɹ_ɪ_t_ˌi]\
Definitions of START OF AUTHORITY
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(SOA) A type of resource record used by theDomain Name System (DNS) to give meta-data about a set ofdomain name data (the contents of a "zone file"). An SOArecord has the following parameters:Serial: the zone serial number - a version number for the zonefile.Refresh: the number of seconds between update requests fromsecondary and slave name servers.Retry: the number of seconds the secondary or slave will waitbefore retrying when an attempt fails.Expire: (time to live - TTL) the number of seconds a master orslave will wait before considering cached data out-of-date.Minimum: previously used to determine the minimum TTL, thisoffers negative caching.
By Denis Howe