The SQL Server Resolution Protocol is an application-layer request/response protocol that facilitates connectivity to a database server. This protocol provides for the following:
Communication endpoint information; for example, the TCP port for connecting to a particular instance of the database server on a machine.
Database instance enumeration.
Sections 1.5, 1.8, 1.9, 2, and 3 of this specification are normative. All other sections and examples in this specification are informative.