多项选择题
A. Interfaces will automatically detect and build adjacencies with neighbor routers
B. DR and BDR elections will not occur
C. DR and BDR elections will occur
D. The neighbor command is required to build adjacencies
E. All routers must be configured in a fully meshed topology with all other routers
单项选择题 According to RFC 2328, what is the stateful order in which an OSPF router transitions to a full adjacency with a neighbor router？（）
单项选择题 Refer to the exhibit. OSPF has been configured on all routers in the network and Area 1 has been configured as a NSSA. Which statement is true about the NSSA Area 1？（）
单项选择题 Refer to the exhibit. Which st atement is true?（）