单项选择题
A. OSPFv3 establishes neighbor adjacencies by using global IPv6 addresses.
B. OSPFv3 establishes neighbor adjacencies by using Link - local addresses.
C. RT1 owns a subnet mask of 64 bits.
D. OSPFv3 establishes neighbor adjacencies by using IPv4 addr esses.
单项选择题 The following exhibit show s ipv6 route output. What would the metric be for a summary route that summarizes all three OSPFv3 routes displayed?（）
单项选择题 IS - IS creates and maintains adjacencies and neighbor relations by using the Hello protocol. For the following options, which are Hello packets used in IS - IS?（）
单项选择题 When learning a new route, if a LSA received is not found in the topological database, what will an internal OSPF router do?（）
