单项选择题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 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 192.168.69.0[120 1] via 192.168.67.2, 00:00:15, Serial1 R 192.168.69.0[120 1] via 192.168.652, 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