Within the L2TP LNS configuration of the router, where ……

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)?（）

A.Start Tunnel Discovery Request
B.Start Control Connection Request
C.L2TP Control Connection Request
D.L2TP Tunnel Establishment Request

单项选择题What is the functionality of L2TP in a BRAS environment?（）

A.It tunnels DHCP requests to the LNS.
B.It provides access for analog modem users.
C.It provides RFC 2547 VPN services to the user.
D.It tunnels a PPP session across an IP backbone.

单项选择题Which CLI command displays the active L2TP sessions on an LAC?（）

A.show subscriber
B.show l2tp tunnel
C.show l2tp session
D.show tunnel session

单项选择题Which sequence of messages demonstrates the communications between the LAC and LNS when theyestablish an L2TP session?（）

A.Incoming Call Reply, Incoming Call Request, Incoming Call Connected
B.Incoming Call Reply, Incoming Call Connected, Incoming Call Request
C.Incoming Call Request, Incoming Call Reply, Incoming Call Connected
D.Incoming Call Request, Incoming Call Connected, Incoming Call Reply