A.FirewallB.BridgeC.RepeaterD.RouterWhich of the follow……

单项选择题Which of the following protocols is used to encrypt data between web servers and web browsers?（）

A.SMTP
B.SIP
C.HTTP
D.SSL

单项选择题A user plugged a cable between two network jacks that attach to the same switch and caused a broadcast storm. Which of the following would have prevented the broadcast storm?（）

A. Spanning tree
B. VLAN tagging
C. 802.1x
D. Port mirroring

多项选择题A network consultant is asked to set up a wireless network in a home. The home user wants the wireless network to be available in every comer of the house. Which of the following additional information will the technician need to determine the equipment for the installation? （）(Select TWO)

A. The length of the house
B. How many rooms are in the house
C. How many users will be using the wireless network
D. The building material of the house
E. The cost of the house

单项选择题Which of the following LAN technologies is defined as fast Ethernet?（）

A.10Base-T
B.100Base-T
C.100Base-FX
D.1000Base-T

单项选择题Which of the following security threats involves making phone calls?（）

A.Phishing
B.Vishing
C.DDoS
D.Xmas attack