单项选择题

Which of the following is the MOST common secure web server port?（）

A.22
B.80
C.110
D.443

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多项选择题

A client states they are receiving poor signal strength on their wireless Internet connection. Which of the following is MOST likely causing the interference?（）

A. Cordless phones
B. Drywall
C. Access points
D. Microwaves
E. Fluorescents lights

单项选择题

Which of the following BEST describes a hub?（）

A. Determines the best route to transmit data
B. Inspects traffic and accepts or declines transmission
C. Broadcasts data to specific network devices
D. Broadcasts data to all network devices