Refer to the exhibit． Why are two OSPF designated routers identified on Core_Router?
A、
Core_Router is connected to more than one multiaccess network．
B、
The router at 208．149．23．130 is a secondary DR in case the primary fails．
C、
Two router IDs have the same OSPF priority and are therefore tied for DR election．
D、
The DR election is still underway and there are two contenders for the role．
【正确答案】
A
【答案解析】
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