单项选择题 An administrator only has one public IP address that must be shared among five employees. Which of the following network schemes should be used?（）

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?（）