多项选择题
A. regular upgrade process
B. multivendor support
C. cost savings
D. product variety
E. well-tested interoperability
多项选择题 What are two outcomes of deploying virtual SANs?（） (Choose two.)
多项选择题 Which three connection options are available when configuring a switch port to be part of aprivate VLAN? （）(Choose three.)
单项选择题 How can Cisco NetFlow be used to aid in the operation and troubleshooting of QoS issues? （）