多项选择题 As an experienced technician, you are responsible for Technical Support in your company. You ask one of the trainees to document the layers of an existing CIS network. Which three statements best characterize this process? （）(Choose three.)

多项选择题 As a Network Engineer, you decide to apply Cisco enterprise solution throughout the CIS network. What are the two advantages? （）(Choose two.)

多项选择题 Compare the features of the Cisco PIN architecture and Cisco validated Designs. Which two of the following statements are making sense?（） (Choose two.)