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单项选择题 Refer to the exhibit.Why are two OSPF designated routers designated routers identified on Core-Router？（）

A、Core-Router is connected more than one multi-access 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 ecection is still underway and there are two contenders for the role

  • A

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