What additional instruction must you add to the command 'ipconfig' to clear the DNS cache?

To clear the DNS cache using the command line in a Windows operating system, you need to use the 'ipconfig' command followed by the specific instruction '/flushdns'. This command effectively removes all entries in the DNS client resolver cache, which stores the IP addresses of websites and other network resources to speed up subsequent requests.

When you issue the command 'ipconfig /flushdns', you're instructing the system to discard any stored DNS information, ensuring that the next time a website is accessed, a fresh DNS lookup will occur. This can resolve issues where stale information is causing connectivity problems.

Other commands related to 'ipconfig', such as '/clearcache', '/reset', and '/release', do not fulfill the specific function of flushing the DNS cache. While '/release' is used to release the current DHCP configuration, '/reset' is not an actual ipconfig command, and '/clearcache' is also not a recognized function within ipconfig. Therefore, the correct additional instruction that must be utilized with 'ipconfig' to clear the DNS cache is indeed '/flushdns'.