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Which two subnetworks would be included in the summarized address of 172.31.80.0 /20? ()

题目

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

参考答案
参考答案:D, E