单项选择题
A. show ip protocol
B. show ip ospf
C. sho w ip ospf database
D. show ip ospf interface
单项选择题 Refer to the output. What IOS command produces this output？（）
多项选择题 Into which two types of areas would an area border router (ABR) inject a default route?（）
多项选择题 Router R1 is configured as shown below: router eigrp 100 network 10.0.0.0 eigrp stub Based on the information shown above, which two types of routes will be advertised？（）