A systems administrator needs to improve WiFi performance in a densely populated office tower and use the latest standard. There is a mix of devices that use2. ...

A systems administrator needs to improve WiFi performance in a densely populated office tower and use the latest standard. There is a mix of devices that use2.
4 GHz and 5 GHz. Which of the following should the systems administrator select to meet this requirement?

A. 802.11ac B. 802.11ax C. 802.11g D. 802.11n