多项选择题
Which two subnetworks would be included in the summarized address of 172.31.80.0 /20?（）
A.172.31.17.4/30 B.172.31.51.16/30 C.172.31.64.0/18 D.172.31.80.0/22 E.172.31.92.0/22 F.172.31.192.0/18
多项选择题 What can be determined from the line of show ip route output shown in the exhibit?（）
多项选择题 Which destination addresses will be used by Host A to send data to Host C?（）
多项选择题 Which of the following are types of flow control?（）
