Which L2TP protocol packet is sent by the LAC to establ……

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

单项选择题Which statement describes the function of the LNS in a L2TP environment?（）

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?（）

A.l2tp password connection-to-lac
B.local password connection-to-lac
C.tunnel password connection-to-lac
D.server password connection-to-lac