多项选择题 You are operating a multi-vendor network and are considering adding redundancy at the access level. Which routing redundancy solution should you implement?（）

多项选择题 When HSRP is configured on a network, which two of these items are provided, which are shared between the routers that run HSRP ?（） (choose two)

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.)