若路由器顯示的路由信息如下,則最后一行路由信息是怎么樣得到的?(60) 。
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, Seriall
R 192.168.69.0 [120/1] via 192.168.67.2,00:00:15, Seriall
[120/1] via 192.168.65.2,00:00:24, Serial0
R 192.168.5.0[120/1] via 192.168.07.2,00:00:15,Seriall
R 192.168.3.0[120/1] via 192.168.65.2,00:00:24 Serial0
(60)
A.串行口直接連接的
B.由路由協(xié)議發(fā)現(xiàn)的
C.操作員手工配置的
D.以太網端口直連的