单项选择题 Which of the following is the full range of address block 192.16876.0/23?（）

单项选择题 Which of the following improves wireless performance by allowing only one wireless transmissionon the network at a time?（）

单项选择题 An administrator wants to limit access of a wireless network without requiring authorized users to enter a password or network key. Which of the following methods would MOST likely be implemented on the wireless network?（）