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 CLI command is used to examine whether an L2TP tunnel can be established for domain isp1.com?（）
单项选择题 Where are L2TP attributes configured on a LAC?（）
单项选择题 Which profile configurations allows either PAP or CHAP to be used for authentication?（）
