单项选择题 An administrator wants to be alerted when a network-based attack is underway, but the company policy prohibits blocking or dropping network connections. Which of the following MUST be deployed?（）

单项选择题 Which of the following components is typically used for voice transmissions and has a 10Mbpsmaximum transfer speed?（）

单项选择题 Which of the following commands would be used to display the IP address on a UNIX/Linux computer?（）