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
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?（）
单项选择题 Which of the following protocols would BEST grant the user secure access to a remote location?（）
