单项选择题 An administrator is setting up a network and would like to prevent users from having the ability to plug their PC into the network to receive an IP address. Which of the following addressing schemes should the technician use?（）

单项选择题 Which of the following would be BEST to use when identifying HTTP traffic running on TCP port53?（）

单项选择题 A Stateful firewall is MOST useful in protecting against which of the following network scans?（）