单项选择题
A. Easy VPN
B. GRE tunneling
C. Virtual Tunnel Interfaces
D. DynamicMultipoint VPN
E. Group Encrypted Transport VPN
多项选择题 Which two of these are advantages of placing the VPN device in the DMZ on the firewall?（）
多项选择题 Which two of these are advantages of placing the VPN device parallel to the firewall?（）
单项选择题 What will an Easy VPN hardware client require in order to insert its protected network address when it connects using network extension mode?（）