某网络环境形如：HostA----GE0/0--MSR-1--S1/0-----FrameRelay----S1/0--MSR-2--GE0/0----HostB其

A．ISDN

B．x.25

C．Frame. Relay

D．ATM

为了查看Quidway路由器搭建的帧中继网络的封装类型，应使用什么命令()。

A.show frame-relay map

B.show frame-relay pvc

C.show frame-relay lmi

D.show interface

A．Ethernet

B．PPP

C．Frame. Relay

D．RARP

下列哪种广域网连接方式是电路交换（）

A.ISDN

B.E1

C.DDN

D.Frame-relay

A．ADSL

B．ATM

C．Frame. Relay

D．DDN

In order to troubleshoot an issue with the Testking frame relay network, you log into a remote router via a telnet session and issue the command "debug frame-relay lmi". After a long wait, you fail to see any output. What could be the cause of this problem?（）

A. The IP addresses are configured incorrectly.

B. Frame Relay LMI messages not displayed in real time.

C. The administrator must issue the enable frame-relay lmi debug command.

D. The administrator must issue the terminal monitor command.

E. Debug messages can only be received once through the console port.

F. The administrator must issue the show frame-relay lmi vty 0 4 command

Frame. Relay传输技术涵盖了OSI模型中( )

A、 网络层

B、 链路层

C、 物理层

D、 应用层

哪一个不是二层VPN

A.ATM

B.X.25

C.Frame. relay

D.GRE

下列哪些不是广域网协议?

A.PPP

B.HDLC

C.Frame-Relay

D.OSPF

在配置命令frame-relay map ip 192.168.1.1 dlci 101 broadcast中，数字101的含义是(50)。

A．本端逻辑通道编号

B．本端数据链路编号

C．对端物理接口编号

D．对端链路节点编号