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Refer to the exhibit. The multi-access network has been configured with OSPF in area 0. The router IDs R2 and R3 routers are manually set because R3 must be DR and R2 must be BDR. Router R3 and R2’s interface fast Ethernet 0/0 values has been left default, and Router R1’s interface fast Ethernet 0/0 configuration is displayed in the picture. For some reason R1 keeps being the DR. What can be the source of the problem on R1?

The R1’s Router ID is lower than R2 and R3.

The ip ospf priority of R1 is higher than R2 and R3.

The interface is administratively shut down.

Speed and duplex must be manually set.

The IP address belongs to a different subnet.



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