Refer to the exhibit.
Which two configurations must the engineer apply on this network so that R1 becomes the DR? (Choose two.)
A.R1(config)#router ospf 1正确答案BC
R1(config-router)#router-id 192.168.100.1 B.R1(config)#interface fastethernet 0/0
R1(config-if)#ip ospf priority 200 C.R3(config)#interface fastethernet 0/0 R3(config-if)#ip ospf priority 0 D.R1(config)#interface fastethernet 0/0 R1(config-if)#ip ospf priority 0 E.R3(config)#interface fastethernet 0/0 R3(config-if)#ip ospf priority 200
