请教一个问题。web.config文件里的数据库连接配置

<add name="db_NetShopConnectionString1" connectionString="Data Source=.;Initial Catalog=db_NetShop;Persist Security Info=False;User ID=sa;MultipleActiveResultSets=False;Packet Size=4096;Application Name="Microsoft SQL Server Management Studio""
providerName="System.Data.SqlClient" />
</connectionStrings>问下我标红的地方什么意思，另用户名sa,密码在什么地方