You are the network administrator for Company. You configure an L2TP virtual private network (VPN) connection on your Windows 2000 Professional computer to remotely access Company’s Windows 2000 Routing and Remote Access server. The server is configured to accept a limited number of both PPTP and L2TP connections. You configure the VPN connection to use MS-CHAP v2 only and to require encryption. You also configure TCP/IP to obtain an IP address automatically. Many times when you try to connect, you are unable to because all of the ports are in use. Other times you are able to connect successfully. You want to increase your chances of being able to connect to the server while ensuring that the most secure connection type available is used. What should you do? （）

A. Enable the VPN connection to use MS-CHA
B. Specify a TCP/IP address in the Network properties.
Change the data encryption setting to Optional Encryption.
D. Configure the Type of VPN server I am calling to be Automatic.
E. Configure the Type of VPN server I am calling to be PPT