单项选择题

Under which network type circumstance would an OSPF router establish router adjacencies while not performing the DR/BDR election process?（）

A. Point-to-point
B. Broadcast
C. Non-broadcast multi-access
D. Backbone area 0
E. None of the above

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CCNA(640-801)

Under which network type circumstance would an OSPF router establish router adjacencies while not performing the DR/BDR election process?（）