What is the DNS Cache?

About

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

Resolver

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

Chrome

A chrome cheatsheet

• Type in the address bar

chrome://net-internals/#dns 

• and press the “Clear host cache” button.

Linux

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