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?（）

单项选择题 A VPN connection is not working correctly and the technician is unable to ping the VPN server. Which of the following actions should the technician do FIRST?（）

单项选择题 Which of the following is a TRUE statement about static routing vs. dynamic routing?（）