What is the refresh interval?
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What is the refresh interval?
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The refresh interval is a time interval in which secondary master servers of a zone determine how often to check if their zone data needs to be refreshed. When the refresh interval expires, the secondary master server checks with its source for the zone to see if its zone data is still current or if it needs to be updated using zone transfer. This interval is set in the start of authority (SOA) resource record for each zone.
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