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單項選擇題

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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單項選擇題

Which of the following tools would a technician use to check functionality of a physical networkconnection?（）

A. Butt set
B. Cable tester
C. Protocol analyzer
D. Voltage event recorder

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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