[单选题]16、Which of the following is not required for a basic Easy VPN configuration?一个基本的Easy VPN配置不需要下面的哪一个?
A. ASA outside IP address ASA外部IP地址
B. Configure required routing 配置所需的路由
C. Interface ACL configuration 接口ACL配置
D. Preferred IPsec policies 首选的IPSec策略