单项选择题
During OSPF adjacency formation, in which state is a router in when it is negotiating to be in charge of the database synchronization process?（）
A.A B.B C.C D.D
During OSPF adjacency formation, in which state is a ro...
During OSPF adjacency formation, in which state is a router when it is sending LSA header information to its neighbor?（）
Which statement is true about the frequency of OSPF LSA...
Which statement is true about the frequency of OSPF LSA transmissions?（）
