单项选择题 A user would like to ensure that only their family and their laptops can access a newly installed wireless router. Which of the following BEST accomplishes this?（）

单项选择题 Which of the following wireless networking standards can operate at two different frequenciessimultaneously?（）

多项选择题 Which of the following settings is MOST likely to be controlled through the use of a laptop’sFunction (Fn) key?（）