单项选择题
A.show ip protocol
B.show ip route
C.show ip ospf interface
D.show ip ospf
E.show ip interface
F.None of the other alternatives apply
多项选择题 Which of the following characteristics describe the BPDU Guard feature（）
多项选择题 AnOSPFlinkcanbeinmultiplestatesatanygivenmoment（ie.Exstart，exchange，full）.WhichtwoIOScommandsletyouviewthestateofthelink？（）
单项选择题 You have a multi-area OSPF network and you’re concerned because one of the sites is havingconnectivity problem to resources in a different area. Which IOS privileged mode command wouldyou enter to confirm that your network： （A） has a path to its ABR， （B） has a path to its ASBR， and （C）the SPF calculation is functional？（）