其中某设备路由表信息如下: C 192.168.1.0/24 is directly connected, FastEthernet0/0 R 192.168.3.0/24 [120/1] via 192.168.65.2, 00:00:04, Serial2/0 R 192.168.5.0/24 [120/2] via 192.168.65.2,00:00:04,Serial2/0 C 192.168.65.0/24 is directly connected, Serial2/0 C 192.168.67.0/24 is directly connected, Serial3/0 R 192.168.69.0/24 [120/1] via 192.168.65.2,00:00:04,Serial2/0 则该设备为 (72) ,从该设备到PC1经历的路径为 (73) 。路由器R2接口S2可能的IP地址为 (74) 。