单项选择题
Which of the following methods can move files in clear text and can be easily intercepted?（）
A.RSH
B.SNMP
C.FTP
D.TELNET
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A. Butt set
B. Cable tester
C. Protocol analyzer
D. Voltage event recorder -
单项选择题
Which of the following is an invalid subnet mask?（）
A.255.0.0.0
B.255.256.255.0
C.255.255.255.255
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单项选择题
Which of the following protocols is the LEAST secure and should be avoided on a wireless network?（）
A.WEP
B.PEAP
C.WPA
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