單項(xiàng)選擇題

Which of the following is a secure method of copying information over a public network?（）

A.SCP
B.SMTP
C.SNMP
D.TFTP

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多項(xiàng)選擇題

Which of the following protocols allow the set up, teardown and streaming of VoIP traffic? （）(SelectTWO)

A.NTP
B.VNC
C.RTP
D.SIP
E.TLS

單項(xiàng)選擇題

Which of the following devices is used to connect multiple devices to a network and does not stopbroadcast traffic?（）

A.Switch
B.Hub
C.Modem
D.Repeater