单项选择题 A user reports being occasionally disconnected from the server. Which of the following tools couldthe technician use to determine if it is the client or the server that is dropping the connection?（）

单项选择题 A company needs strong wireless security enabled for minimal cost. Which of the following security measures is the BEST to use?（）

单项选择题 Which of the following networks would MOST likely require EGP routing?（）