Refer to the exhibit. The network shown in the exhibit is running the RIPv2 routing protocol. The network has converged, and the routers in this network are functioning properly. The FastEthernet0/0 interface on R1 goes down. In which two ways will the routers in this network respond to this change?
  • 1、
【正确答案】 1、C,D    
【答案解析】这涉及到RIP关于环路避免的几种机制了。在这里R1的直连的链路发生了变化,立即触发更新(触发更新),发送flash update出去,将这个条目置为possible down,设置最大跳数(路由毒性),R2收到这个flash update后,也回复一个flash update包(毒性逆转),同时将这个条目也置为possible down,设置最大跳数。