If you want, a specific port can be assigned to an instance of SQL Server. By default, when enabled, both named instances and SQL Server Express are configured to use dynamic ports, that is, an available port is assigned when SQL Server starts. During installation, TCP port 1433 and pipe \sql\query are assigned to the default instance, but those can be changed later by the server administrator using SQL Server Configuration Manager.īecause only one instance of SQL Server can use a port or pipe, different port numbers and pipe names are assigned for named instances, including SQL Server Express. This port, or "pipe," is used by that specific instance to exchange data with client applications. If the named pipes protocol is enabled, SQL Server listens on a specific named pipe. When an instance of SQL Server starts, if the TCP/IP protocol is enabled for SQL Server, the server is assigned a TCP/IP port. To resolve limitations of the SSRP system, SQL Server 2005 (9.x) introduced the SQL Server Browser service as a replacement for SSRP. This listener service responded to client requests with the names of the installed instances and the ports or named pipes used by the instance. Only one instance of SQL Server can use a port, so when SQL Server 2000 (8.x) introduced support for multiple instances of SQL Server, SQL Server Resolution Protocol (SSRP) was developed to listen on UDP port 1434. SQL Server listened for incoming requests on port 1433, assigned to SQL Server by the official Internet Assigned Numbers Authority (IANA). Prior to SQL Server 2000 (8.x), only one instance of SQL Server could be installed on a computer. When installing a named instance of SSAS.When installing a named instance of the Database Engine including all instances of SQL Server Express.By default, the SQL Server Browser service starts automatically: SQL Server Browser can be configured during setup or by using SQL Server Configuration Manager. SQL Server Browser is installed with SQL Server. Connecting to dedicated administrator connection (DAC) endpoints.įor each instance of the Database Engine and SQL Server Analysis Services (SSAS), the SQL Server Browser service (sqlbrowser) provides the instance name and the version number.
Connecting to the correct server instance.
SQL Server Browser contributes to the following actions: SQL Server Browser listens for incoming requests for Microsoft SQL Server resources and provides information about SQL Server instances installed on the computer.
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The SQL Server Browser program runs as a Windows service. Applies to: SQL Server (all supported versions) - Windows only
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