单项选择题
A.10.1.1.1
B.127.0.0.1
C.192.168.0.1
D.239.1.1.1
多项选择题 The network administrator of the Oregon router adds the follwing command to the router configuration: ip route 192.168.12.0 255.255.255.0 172.16.12.1. What are the results of adding this command?（）
多项选择题 The OSPF hello protocol performs which of the following tasks?（）
多项选择题 Which of the following describe private IP addresses?（）