单项选择题 Which of the following devices will allow a technician to measure the amount of data that is capable of traversing the network?（）

单项选择题 Which of the following should be used to ensure that all packets are received by every connecteddevice?（）

单项选择题 A network technician is concerned about the environmental effects of power consumption and heat from network resources Limited space is also a concern. Which of the following technologies should be implemented?（）