单项选择题 Which set of configuration commands illustrates the correct configuration steps for a PPP over ATM Interface?（）

多项选择题 What are three ways an IP interface can be assigned to a virtual router in a PPP over ATM environment? （）(Choose three.)

单项选择题 Which configuration component is required to allow a PPP over ATM client to connect to one virtual router for a particular session and to a different virtual router for another session?（）