- 单项选择题 Refer to the exhibit. Router R1 is being used as a relay device for autoconfiguration of switch S1.Which configuration will acc omplish this? （）
A、S1(config)# interface fastethernet 0/1 S1(config - if)# ip helper - address 10.0.0.2
B、S1(config)# interface fastethernet 0/1 S1(config - if)# ip helper - address 20.0.0.1
C、R1(config)# interface fastethernet 0/0 R1(config - if)# ip help er - address 20.0.0.2R 1(config - if)# ip helper - address 20.0.0.3 R1(config - if)# ip helper - address 20.0.0.4 R1(config - if)# exit R1(config)# interface fastethernet 0/1 R1(config - if)# ip helper - address 10.0.0.1
D、R1(config)# interface fastethernet 0/0 R1 (config - if)# ip helper - address 20.0.0.1 R2(config)# interface fastethernet 0/0 R2(config - if)# ip helper - address 20.0.0.1 R3(config)# interface fastethernet 0/0 R3(config - if)# ip helper - address 20.0.0.1 R4(config)# interface fastethernet 0/0 R4(config - if)# ip helper - address 20.0.0.1
E、S1(config)# interface fastethernet 0/1 S1(config - if)# ip helper - address 10.0.0.2 R2(config)# interface fastethernet 0/0 R2(config - if)# ip helper - address 20.0.0.1 R3(config)# interface fastethernet 0/0 R3(config - if) # ip helper - address 20.0.0.1 R4(config)# interface fastethernet 0/0 R4(config - if)# ip helper - address 20.0.0.1
- C
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