What does connection string consist of?

Connection String for .Net & SQL Server consist of:
1.Data Source = “./SQLEXPRESS”; serverName\instanceName as Data Source to use a specific SQL Server instance
2.Initial Catalog = “DATABASE_NAME”;
Either3.Uid=”UserID for SQL server” ;4.Password= “Password for SQL server”;ORIntegrated Security=”True”; Use Windows security
5.Provider Name =”System.Data.SqlClient”;