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
单项选择题 Which command can you use to manually assign a static IPV6 address to a router interface？（）
多项选择题 For what two purposes does the Ethernet protocol use physical addresses? （）
多项选择题 What can be determined from the line of show ip route output shown in the exhibit?（）
