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（）

单项选择题 You have amulti-area OSPF network and you’re concerned because one of the sites is having connectivity problem to resources in a different area. Which IOS privileged mode command would you enter to confirm that your network ：A.has a path to itsABR，B.has a path to itsASBR，and C.the SPF calculation is functional（）

单项选择题 Which command should you use to verify what networks are being routed by a given OSPF process（）