Authoritative and Recursive DNS

Posted on 2010-09-14
Medium Priority
Last Modified: 2012-05-10
What is the difference between Authoritative and Recursive DNS
Where Authoriative DNS is used & where Recursive DNS is used.
Question by:SrikantRajeev
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Expert Comment

by:Jan Springer
ID: 33677668
Authoritative means configured and authorized to provide information regarding a DNS request for a host record.

Their are two types of queries:

1) a query for a zone record for which a server is authoritative and that server can answer directly

2) a query for a zone record for which a server is not authoritative -- this is also called "recursion" and for which the server must search up the tree to find an authoritative DNS server to provide an answer.

Author Comment

ID: 33688094
please let me know if a DNS server can be configured both for Authoritative and Recursive DNS
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Accepted Solution

Jan Springer earned 2000 total points
ID: 33691732

You would configure the zone files for which you are authoritative, use a root hints file and allow your subnets to use your server to resolve external hosts.

Author Closing Comment

ID: 33804605

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