A Mysql instance is running on a dedicated server. Developers access the server from the same network subnet. Users access the database through an application that is running on a separate server in a DMZ. Which two will optimize the security of this setup?（）

• A、Disabling connections from named pipes or socket files (depending on the operating system of the server)
• B、Enabling and using SSL for connections to the Mysql database
• C、Installing Mysql on the application server, and running the database and application on the same server
• D、Starting the server with – bind- address=0.0.0.0 specified
• E、Running the server with – skip-networking specified
• F、Limiting logins to originate from the application server or the server's subnet'