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?（）
单项选择题 On which of the following transmission media types can LC connectors be found?（）
多项选择题 Which of the following protocols encrypt communication?（）
