单项选择题
Within the L2TP LNS configuration of the router, where is the PPP authentication method specified?（）
A.profile B.remote host C.aaa domain-map D.l2tp destination profile
多项选择题 Which two statements are true about L2TP tunnel switching?（）
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?（）
