单项选择题 A user states that the wireless router keeps rebooting while the power to the other equipment stays on. Which of the following should the technician perform to prevent users from rebooting the router?（）

单项选择题 A user can receive email but cannot send email with the email client software. Which of the following protocols is incorrectly configured?（）

单项选择题 Which of the following will allow a technician to extend a partition?（）