单项选择题 Multiple users call from the same location saying that they have no network connectivity. The administrator is unable to ping the main switch at that IDF. Which of the following configuration management documents would the administrator MOST likely consult to troubleshoot the issue?（）

单项选择题 Which of the following is used to reduce the number of public IP addresses required?（）

单项选择题 A company finished upgrading the wireless encryption to WPA2 Enterprise. The administrator receives a call from a user who is unable to connect to the company wireless. Which of the following is MOST likely causing the connection problem?（）