多项选择题
A. PPP session ID
B. subscriber name
C. source MAC address
D. destination MAC address
单项选择题 Which CLI command displays the currently connected PPPoA subscribers?（）
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.)