单项选择题
Which VPN management feature would be considered to ensure that the network had the least disruption of service when making topology changes?（）
A. dynamic reconfiguration B. path MTU discovery C. auto setup D. remote management
多项选择题 Which two characteristics are most typical of a SAN? （）
单项选择题 What is high availability?（）
单项选择题 What is the purpose of IGMP in a multicast implementation?（）
