单项选择题
A. Cisco IPS
B. Cisco Network Assistant
C. Cisco VAM2+
D. Cisco SDM
单项选择题 Which of the following is an easy-to-use tool that allows you to easily configure and monitor Cisco Integrated Services Routers?（）
多项选择题 What are four advantages to using tunnel brokers in an IPv6 transition environment?（）
多项选择题 Which three of these items are IPv6 transition mechanisms? （）(Choose three.)