单项选择题

An administrator needs a network that can support up to 800 hosts on the same subnet. Which of the following is the MINIMUM subnet mask that should be used？（）

A.255.0.0.0
B.255.255.0.0
C.255.255.252.0
D.255.255.255.0

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SK0-003

An administrator needs a network that can support up to 800 hosts on the same subnet. Which of the following is the MINIMUM subnet mask that should be used？（）