You need to design the network to support the company’s VPN requirements for mobile users who connect to the network in Seattle. Which two actions should you perform？（）

• A、Use a password generator application to create a preshared key， and distribute it to all mobile users
• B、Use computer autoenrollment to create digital certificates that can be used to authenticate to a VPN server
• C、Acquire a digital certificate that can be used for SSL from a commercial CA for each computer that established a VPN connection
• D、Configure IPSec policies on all Routing and Remote Access servers to require the use of digital certificates