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What is the ipconfig switch to flush DNS cache?

  1. ipconfig /renew

  2. ipconfig /all

  3. ipconfig /flushdns

  4. ipconfig /release

The correct answer is: ipconfig /flushdns

The /renew switch in ipconfig is used to renew the IP address, while the /all switch displays all configuration information for all connections. The /release switch releases the IP address for a specified adapter. These options are not related to flushing the DNS cache. Therefore, C is the correct answer as it specifically targets the DNS cache.