Client-Side Cache and HOST Resolution Problems
Windows 2000 and higher clients have a built-in client cache for name resolution that caches all information retrieved from name servers. When requesting lookups, the client resolver parses this cache first, before contacting the name server. Items remain in this cache until the TTL expires, the machine is rebooted, or the cache is flushed. In cases where erroneous information has been entered into the client cache, it can be flushed by typing ipconfig /flushdns at the command prompt.
By default, all clients have a file named HOSTS that provides for a simple line-by-line resolution of names to IP addresses. This file is normally located in \%Systemroot%\System32\Drivers\etc. Problems can occur when ...
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