The following routes exist in the Testking router（）

• A、R 12.18.8.0/24 [120/1] via 12.18.2., 00:00:10, Serial0
• B、R 12.18.11.0/24 [120/7] via 12.18.9.1, 00:00:03, Serial1
• C、C 12.18.1.0/24 is directly connected, Ethernet0
• D、R 12.18.5.0/24 [120/15] via 12.18.2.2, 00:00:10, Serial0