单项选择题 As an experienced network administrator, you are asked to troubleshoot a QoS problem. In which way might the Cisco NetFlow be helpful during the troubleshooting process?（）

单项选择题 As a Network Engineer in a large-sized company, you have to master the knowledge of the Cisco mobility solution. Which of the following statement most appropriately identifies the characteristics of it?（）

单项选择题 As an experienced Network Engineer, you are required to characterize an existing CIS network. In such a situation, what is the last step to take?（）