单项选择题
A. It will ignore the update and take no further action.
B. It will add the update information to its routing table.
C. It will replace the existing routing table entry with the update information.
D. It will delete the existing routing table and will send out hello packets to rebuild the routing table.
单项选择题 The Testking network is utilizing RIP as the IP routing protocol. Router TK1 learns how to reach the same destination via 6 different paths. All paths have the same metric and administrative distance. With all routers using the default operation,which of the paths will be chosen to reach the destination?（）
多项选择题 Which of the following statements are correct in regard to classless routing protocols?（）
单项选择题 Which one of the following statements best explains the split horizon rule used in distance vector routing protocols?（）