Use the -n command line switch as a server switch (to name the server). This prevents you from unintentionally connecting to the wrong server.
The server and database names are among the connection parameters that client applications can use when connecting to a database. On Windows, the server name appears on the desktop icon and on the title bar of the server window.
If no server name is provided, the first database started provides the default server name.
Server names and database names are case-insensitive on Windows, and case-sensitive on UNIX.
Adopt a set of naming conventions for your servers and databases, as well as for all other database objects, that includes a case specification. Enforcing naming conventions can prevent problems for users.