单选题
若路由器显示的路由信息如下,则最后一行路由信息是怎样得到的?______。 R3#show ip route Gateway of last resort is not set 192.168.0.0/24 is sconetted,6 subnets C 192.168.1.0 is directly connected,Ethernet0 C 192.168.65.0 is directly connected,Serial0 C 192.168.67.0 is directly connected,Serial1 R 192.168.69.0 [120/1] via 192.168.67.2,00:00:15,Serial1 [120/1] via 192.168.65.2,00:00:24,Serial0 R 192.168.5.0 [220/1]via 192.168.07.2,00:00:15,Serial2 R 192.168.3.0 [220/1] via 192.168.65.2,00:00:24,Serial0 A.串行口直接连接的 B.由路由协议发现的 C.操作员手工配置的 D.以太网端口直连的