以下是配置PPP认证时通过debug ppp authentication得到的信息，请问该协议是几路握手？
%UPDOWN：Interface Serial0，changed state to up
PPP Serial0：Send CHAP challenge id=2 to remote
PPP Serial0：CHAP response id=2 received from user1
PPP Serial0：Send CHAP success id=2 to remote
PPP Serial0：remote passed CHAP authentication.
%UPDOWN：Line protocol on Interface Serial0，changed state to up ( )
%UPDOWN：Interface Serial0，changed state to up
PPP Serial0：Send CHAP challenge id=2 to remote
PPP Serial0：CHAP response id=2 received from user1
PPP Serial0：Send CHAP success id=2 to remote
PPP Serial0：remote passed CHAP authentication.
%UPDOWN：Line protocol on Interface Serial0，changed state to up ( )
举一反三
- 以下是配置PPP认证时通过debug ppp authentication得到的信息，请问该协议是几路握手？ %UPDOWN：Interface Serial0，changed state to up PPP Serial0：Send CHAP challenge id=2 to remote PPP Serial0：CHAP response id=2 received from user1 PPP Serial0：Send CHAP success id=2 to remote PPP Serial0：remote passed CHAP authentication. %UPDOWN：Line protocol on Interface Serial0，changed state to up ( )
- PPP 中启用 CHAP 认证命令为：ppp chap authentication
- 表示：串口 第二个大插槽/第二小插槽/第二个接口的是（ ） A: serial 0/0/0 B: serial 1/1/1 C: serial 2/2/2 D: serial 3/3/3
- 当学生A用两台R2624路由器在做路由器广域网口连通实验时误将本端路由器V.35线缆的插头插倒了。结果发现ping直连的路由器不通，请问此时查看本端路由器的状态应该是：（ ） A: Serial 0 is up, line protocol is up B: Serial 0 is up, line protocol is Down C: Serial 0 is Down, line protocol is Down D: Serial 0 is Down, line protocol is up
- 两台路由器 MSR-1、MSR-2 通过RIP 完成路由的动态学习,在 MSR-1 上看到如下 debug 信息: *Nov 26 02:20:25:353 2008 H3C RM/6/RMDEBUG: RIP 1 : Sending v2 request on Serial 0/0 from 3.3.3.3 *Nov 26 02:20:25:353 2008 H3C RM/6/RMDEBUG: RIP 1 :Sending request on interface Serial0/0 from 3.3.3.3 to 224.0.0.9 *Nov 26 02:20:25:400 2008 H3C RM/6/RMDEBUG: RIP 1 : Receiving v2 request on Serial0/0 from 3.3.3.1 根据 debug 信息可以推测 。