单项选择题
Which IOS command would you use to find out which networks are routed by a particular OSPF process（）
A.show ip ospf
B.show ip route
C.show ip protocols
D.show ip ospf database
E.None of the other alternatives apply
单项选择题 AtwhichlayeroftheOSImodeldoestheSpanningTreeProtocol（STP）operateat？（）
单项选择题 Which command would display OSPF parameters such as filters，default metric，maximum paths，and number of areas configured on a outer（）
多项选择题 An OSPF link can be in multiple states at any givenmoment(ie.Exstart,exchange,full). Which two IOS commands let you view the state of the link（）