单项选择题
On which of the following transmission media types can LC connectors be found?（）
A.UTP
B.STP
C.Coaxial
D.Fiber
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Which of the following protocols encrypt communication?（）
A.HTTPS
B.TELNET
C.SMTP
D.DNS
E.SSH -
单项选择题
Which of the following protocols would BEST grant the user secure access to a remote location?（）
A.VPN
B.FTP
C.POP3
D.DNS -
单项选择题
Which of the following devices is used to move frames between a source and destination basedon a MAC address?（）
A.Repeater
B.Hub
C.Router
D.Switch
