A stub zone is a "special" kind of DNS zone that points to another DNS zone and only maintains a list of the DNS servers found in that domain. For example, if I have a domain that I own named mydomain.com and you have a domain named yourdomain.com, I can create in my DNS structure a stub zone that resolves queries for yourdomain.com, where the only records found in my copy of yourdomain.com are NS (name server) records. All of the actual resource records (A, CNAME, etc, etc) only live on your DNS servers in yourdomain.com, not mine in mydomain.com. That means a client in my domain can query my DNS servers, which then in turn query your DNS servers for the answer before passing that result back to the client. Cheers, Lain

Kindly tell me what is Stub Zone?With warm regards, Kiran Sawant

A stub zone is like a secondary zone in that it obtains its resource records from other name servers (one or more master name servers). A stub zone is also read-only like a secondary zone, so administrators can't manually add, remove, or modify resource records on it. But the differences end here, as stub zones are quite different from secondary zones in a couple of significant ways. First, while secondary zones contain copies of all the resource records in the corresponding zone on the master name server, stub zones contain only three kinds of resource records: A copy of the SOA record for the zone. Copies of NS records for all name servers authoritative for the zone. Copies of A records for all name servers authoritative for the zone. Note: STUB zone scenario is good when you have more than one forest. http://technet.microsoft.com/en-us/library/cc779197(WS.10).aspx http://www.arabitpro.com

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