单项选择题 Several users from the same location are reporting problems accessing the intranet server. An administrator has verified that no other remote areas are having issues connecting to the same server. Which of the following steps should the administrator perform NEXT?（）

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).