多项选择题 Which of the following features does SNMPv3 have over previous versions when remotely monitoring networking devices? （）(Select TWO).

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?（）