mirror site
It is generally best to use the mirror that is physically closest to you as this will usually give the fastest download.
Such mirroring is usually done for specific whole directories or files on a specific remote server as opposed to a cache or proxy server which keeps copies of everything that is requested via it.
For example, src.doc.ic.ac.uk is the main UK mirror for the GNU archive at gnu.org. There are also several mirrors of this dictionary.
(2004-03-01)

