DNS - Cache

Map Of Internet 1973


A DNS cache is a cache of the result of a DNS lookup (query).


The cache is implemented in a DNS library by the resolver.

You need to configure the resolver to configure or purge your cache.

Example: How to flush


A chrome cheatsheet

  • Type in the address bar
  • and press the “Clear host cache” button.


To clear your local DNS cache, you have to type

ipconfig /flushdns

This is important when you try to troubleshoot a network problem because if a name is already cached it won't try and resolve the name again.

Network - ipconfig

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