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
单项选择题 Which of the following tools would a technician use to check functionality of a physical networkconnection?（）
单项选择题 Which of the following is an invalid subnet mask?（）
单项选择题 Which of the following protocols is the LEAST secure and should be avoided on a wireless network?（）
