若路由器的路由信息如下,则最后一行路由信息怎样得到的( ) R3#show ip route Gateway of last resort is not set 192.168.0.0/24 is subnetted, 6 subnets C 192.168.1.0 is directly connected, Ethernet0 C 192.168.65.0 is directly connected, Serial0 R 192.168.69.0 [120/1] via 192.168.652, 00:00:24, Serial0