MU-MIMO allows a router to transmit separate signals to multiple devices simultaneously
Older routers used to transmit data in all directions in the hope that the signal would reach any devices within range. The latest 802.11ac routers use beamforming to aim it at individual devices more accurately.
1 Inside , Outside
Routers with 802.11ac use multiple antennas to boost signal strength. Netgear’s R7800 has four large antennas on the outside, but rivals such as the BT Smart Hub hide them neatly inside.
2 Internet Acccess
Remember that a router such as the R7800 can connect your devices together, but it doesn’t include a modem for connecting to the internet. You’ll need a separate modem or a combined modem-router for internet access.