[单选]
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

《寂静的春天》是（）的著作，该书讲述的是农药对人类环境的危害。蕾切尔·卡森。瑞秋。蕾切尔·珀查。凯特。胃容受性舒张瓦萨尔利是法国视幻艺术家。 What three tasks must a network administrator perform to properly configure Hot Standby Routing Protocol （HSRP）？（） Define the encapsulation type.。 Define the standby router.。 Define the standby IP address.。 Enable the standby priority.。作用于运动空气的力有水平气压梯度力、水平地转偏向力、惯性离心力、摩擦力。

Refer to the exhibit. Router R1 is being used as a relay device for autoconfiguration of switch S1.Which configuration will acc omplish this? （）

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[单选] Refer to the exhibit. Router R1 is being used as a relay device for autoconfiguration of switch S1.Which configuration will acc omplish this? （）

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[单选]
Refer to the exhibit. Router R1 is being used as a relay device for autoconfiguration of switch S1.Which configuration will acc omplish this? （）