IEEE 802.11ac

IEEE 802.11ac

Approved in January 2014, this is a wireless standard for high-throughput wireless local area networks (WLANs) on the 5 GHz band. In contrast to the four MIMO spatial streams in 802.11n, the 802.11ac standard supports eight.

Source:

http://www.aeris.com/iot-dictionary/

References:

https://en.wikipedia.org/wiki/IEEE_802.11ac