Examining Root Hints
By default, a DNS installation includes a listing of Internet-level name servers that can be used for name resolution of the .com, .net, .uk, and like domain names on the Internet. When a DNS server cannot resolve a query locally in its cache or in local zones, it consults the Root Hints list, which indicates which servers to begin iterative queries with.
The Hints file should be updated on a regular basis to ensure that the servers listed are still relevant. This file is located in \%systemroot%\system32\DNS\cache.dns and can be updated on the Internet at the following address:
ftp://ftp. internic.net/domain/named.cache
At the time of writing, the latest root hints file, or root name servers, was dated Jun 8, 2011. The contents ...
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