单项选择题 Which condition must be satisfied before an EIGRP neighbor can be considered a feasiblesuccessor?（）
单项选择题 You are developing a verification plan for an upcoming OSPF implementation. Part of this plan is to verify the status of type 3 LSAs within the network. Which routers should you verify first to ensure that the configuration s are correct for generating type 3 LSAs?（）
单项选择题 When verifying OSPF virtual link problems, which is an important item to check on the two transit OSPF routers?（）