Real world 802.11n performance

[Blastuk]

The difference between a switch and a hub is that a hub must run all ports at the speed of the slowest negotiation.

A switch will negotiate the fastest speed between 2 ports that are currently communicating with each other.

Very important distinction between switches and hubs:

A hub broadcasts packets it receives to all other ports which causes packet collision.
A switch routes packets it receives to specific ports that it learns.

[Blastuk]

Ah, I didn't know it would work that way. I thought that in the same way that connecting a USB 3 switch to an USB 2 device is not going to grant you USB3 speed, the speed transfer rate will be held back by the slowest device.

If you hook a Gigabit switch to a 100 Megabit port, anything travelling through the 100 Megabit port is restricted to 100 Megabits.
Anything travelling in through a Gigabit port on the switch and out another Gigabit port on the same switch can still be at Gigabit speed, even if that switch is connected to another 100 Megabit device.

tl;dr, speed is limited to lowest speed link the packets travel through.