单项选择题 customer wants to network several computers within a large warehouse. The warehouse has one computer at the very far end of the warehouse that is 170 meters (557 feet) from the network switch. Which of the following cable types should a technician use for this computer?（）

单项选择题 A company is about to install a second network connect on with a new ISP. Which of the followingrouting protocols is the BEST choice?（）

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?（）