单选题The network administrator has discovered that the power supply has failed on a switch in the company LAN and that the switch has stopped functioning. It has been replaced with a Cisco Catalyst 2950 series switch.What must be done to ensure that this new switch becomes the root bridge on the network?（）AOne router is running RIPv1.BRIP neighbor is 224.0.0.9.CThe network contains a loop.DNetwork 10.10.1.0 is reachable.
单选题
The network administrator has discovered that the power supply has failed on a switch in the company LAN and that the switch has stopped functioning. It has been replaced with a Cisco Catalyst 2950 series switch.What must be done to ensure that this new switch becomes the root bridge on the network?（）
A
One router is running RIPv1.
B
RIP neighbor is 224.0.0.9.
C
The network contains a loop.
D
Network 10.10.1.0 is reachable.
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