单项选择题
A. packets per second
B. number of remote sites
C. throughput bandwidth
D. number of tunnels
单项选择题 In which tunnel-less VPN topology do group members register with a key server in order to receive the security association necessary to communicate with the group?（）
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?（）