Hi,
Thanks for posting in Q&A platform.
DNS records have a Time To Live (TTL) value associated with them which tells a DNS cache how long the particular record is good for. Records in the cache are kept for their TTL, then re-queried. The TTL was defined in SOA record of specific zone in DNS server. If you need clear DNS cache from client side for every 15 minutes, it is OK. After these caches were cleared, if needed, the client will re-query these records from DNS server.
On a Windows machine you can see a list of all the records in your cache along with their TTL by executing the following command at the command prompt:
ipconfig /displaydns
TTL times are always represented in seconds.
You can force a flush of all cached DNS records using the following command:
ipconfig /flushdns
Best Regards,
Sunny
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