单项选择题

A TestKing PC has the IP address 172.16.209.10 /22. What is the subnet of this address?（）

A.172.16.42.0
B.172.16.107.0
C.172.16.208.0
D.172.16.252.0
E.172.16.254.0

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CCNA(640-801)

A TestKing PC has the IP address 172.16.209.10 /22. What is the subnet of this address?（）