两台路由器通过串口0相连，PCA（IP地址：168.1.2)与RouterA以太网口0相连，PCB（IP地址：192.168.2.2)与RouterB以太网口0相连，PC默认网关配置正确。路由器配置如下：RouterA#showrunning-config!interfaceEthernet0speedautoduplexautonoloopbackipaddress192.168.1.1255.255.255.0!interfaceSerial0encapsulationpppphysical-layerspeed64000ipaddress10.1.1.1255.255.255.0!exitrouterripnetwork10..0.0.0redistributeconnected!EndRouterB#showrunning-configNowcreateconfiguration...Currentconfiguration!version1.4.1!interfaceEthernet0speedautoduplexautonoloopbackipaddress192.168.2.1255.255.255.0!interfaceSerial0encapsulationpppipaddress10.1.1.2255.255.255.0!exitrouterripnetwork10.0.0.0redistributeconnected!End以下说法正确的是：