单项选择题
A.The route table is cleared. Then the OSPF neighbors are reformed
B.The OSPF adjacencies are cleared and initiated again
C.The OSPF database is repopulated and then the shortest path first （SPF） algorithm isperformed.
D.The shortest path first （SPF） algorithm is performed on the LSA database
E.None of the other alternatives apply
多项选择题 Refer to the exhibit. What two statements are true？（）
单项选择题 Refer to the output. What IOS command produces this output？（）
单项选择题 Refer to the exhibit. Assume that Switch_A is active for the standby group and the standby devicehas only the default HSRP configuration. What conclusion is valid？（）