Original Location: http://blog.kowalczyk.info/kb/local-dns-modifications-on-windows---etc-hosts-equivalent-.html
On Unix, /etc/hosts file contains mappings between an IP address and a name of the host. It overrides mappings from DNS. Windows has an equivalent of this file: c:\WINDOWS\system32\drivers\etc\hosts (at least that's the name on Windows XP).
Here's the simplest mapping from 127.0.0.1 to localhost and a.test.cc names:
127.0.0.1 localhost a.test.cc