It's important to have a fairly good idea of how DNS queries are handled before starting to architect your name resolution system (or change an existing system that is functioning properly). This topic contains step-by-step descriptions of DNS queries using several scenarios:
A query handled by an authoritative server
A query handled by a non-authoritative server
A reverse-lookup query
Knowing how DNS queries are handled helps when designing a DNS system and when integrating Windows Server 2003 name services into an existing DNS infrastructure.
Assume, for example, that a user at a Windows Server 2003 computer in the company.com domain pings a server called