Infrastructure mode is a wireless network framework that has a central WLAN access point / router at the heart of the network. In infrastructure mode, wireless devices communicate with each other through an WLAN access point/router. When the Brother wireless machine is part of infrastructure mode network, it receives all print jobs via an WLAN access point / router.
The WLAN access point / router can also act as a bridge or a gateway to a wired network, and wireless devices can communicate not only with each other but also with a wired network.
NOTE: Illustrations shown below are from a representative product and may differ from your Brother machine.