[单选题]

A． Ezonexam 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

参考答案与解析：

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