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How often does the DNS cache refresh?
When a DNS client creates a record, it is assigned a timestamp. The DNS client attempts to refresh this record every 24 hours. Unless the record is changed (for example, the client receives a new IP address), the timestamp cannot be refreshed for a default period of seven days.
How often is DNS cache clear?
By default, Windows stores positive responses in the DNS cache for 86,400 seconds (i.e., 1 day) and stores negative responses for 300 seconds (5 minutes).
How often do DNS servers replicate?
Inter-site replication: By default, the replication interval is 180 minutes and can be adjusted to be as low as 15 minutes.
How long does it take for DNS to flush?
How Often Should I Flush my DNS Cache? It takes 15 minutes for DNS cache to fully clear.