题目内容

The ﬁrst tomb was built at the ____(begin) of the 15th century.

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The whole process is wasteful and ____(efﬁcient).

Ben's ____(fail) in the ﬁnal exam resulted from his carelessness.

下面哪个OSPF版本适用于IPv6？

A.OSPFv1
B.OSPFv2
C.OSPFv3
D.OSPFv4

以下哪个命令可以查看OSPF 是否已经正确建立邻居关系？

A.display ospf neighbor
B.display ospf brief
C.display ospf peer
D.display ospf interface