网络172.21.136.024和172.21.143.024汇聚后的地址是?


网络172.21.136.0/24和172.21.143.0/24汇聚后的地址是?

A.172.21.136.0/21

B.172.21.136.0/20

C.172.21.136.0/22

D.172.21.128.0/21

正确答案:A