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單項選擇題

Which of the following is an invalid subnet mask?（）

A.255.0.0.0
B.255.256.255.0
C.255.255.255.255
D.255.255.00

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單項選擇題

Which of the following protocols is the LEAST secure and should be avoided on a wireless network?（）

A.WEP
B.PEAP
C.WPA
D.TKIP

單項選擇題

Which of the following should be configured to provide priority to voice traffic?（）

A. Port mirroring
B. DMZ
C. Qos
D. Trunking

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