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?（）

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)

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