請參見圖示。路由器 R1(作爲 DCE 設備)已經配置爲使用帶身份驗證的 PPP 封裝。下列哪組命令可使另一路由器(作爲 DTE 設備)通過 serial 0/0/0 接口與路由器 R1 通信?
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Router(config)#hostname R3
R3(config)# username R1 password Cisco
R3(config)#interface serial 0/0/0
R3(config-if)# encapsulation ppp
R3(config-if)# ip address 172.16.3.3 255.255.255.0
R3(config-if)# ppp authentication chap
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Router(config)#hostname R3
R3(config)# username R3 password Cisco
R3(config)#interface serial 0/0/0
R3(config-if)# encapsulation ppp
R3(config-if)# ip address 172.16.3.3 255.255.255.0
R3(config-if)# ppp authentication chap
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Router (config)# username Router password Cisco
Router(config)#interface Serial 0/0/0
Router (config-if)# clockrate 64000
Router (config-if)# encapsulation ppp
Router (config-if)# ip address 172.16.3.1 255.255.255.0
Router config-if)# ppp authentication chap
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Router (config)# username R1 password Cisco
Router config)# interface Serial 0/0/0
Router (config-if)# clockrate 64000
Router config-if)# encapsulation ppp
Router (config-if)# ip address 172.16.3.1 255.255.255.0
Router (config-if)# ppp authentication chap |