多项选择题
Which two statements are true about L2TP tunnel switching?（）
A.Requires only one tunnel switching license. B.Requires two licenses, one for inbound and one for outbound sessions. C.Enabled automatically when the BSR is configured as an LAC and LNS. D.Aids in L2TP tunnel scaling.
单项选择题 Which L2TP protocol packet is sent by the LAC to establish the control connection (tunnel)?（）
单项选择题 What is the functionality of L2TP in a BRAS environment?（）
单项选择题 Which CLI command displays the active L2TP sessions on an LAC?（）
