One of three methods of requesting that name servers handle name lookups. DNS queries can occur between resolvers and name servers, and between name servers and other name servers. Queries can be answered by the queried name server from its local DNS database, from previously cached query results, or from a referral to another name server.
The three basic kinds of DNS queries are recursive queries, iterative queries, and inverse queries.
For more information on these types of DNS queries, see their respective entries in this work.