单项选择题
A.It initiates both the PPP session and the tunnel.
B.It initiates the PPP session and terminates the tunnel.
C.It terminates the PPP session and initiates the tunnel.
D.It terminates the PPP session and terminates the tunnel.
单项选择题 Which command parameter configures a password of connection-to-lac for an L2TP tunnel on an LNS?（）
单项选择题 Which configuration command dynamically detects and configures a PPPoA interface?（）
单项选择题 With the command atm bulk-config test vc-range 1 3 200 400, what is the correct interpretation of the numeric values following the vc-range?（）