单项选择题 Which of the following would be used to lock all of the primary communication equipment of abuilding, including its demarcation point?（）

单项选择题 A technician at a company providing online, real-time media streaming to the Internet needs a network technology that will reduce bandwidth while delivering high throughput. Which of the following can the technician implement to fit these requirements?（）

单项选择题 A computer is able to ping other devices on the same network but is unable to ping devices onanother network. Which of the following needs to be configured?（）