Brother NC-7100W - Manual (Page 134)

APPENDIX B - 2
Infrastructure Mode
Infrastructure mode networks have a central access point at the
heart of the network. The access point can also act as a bridge or a
gateway to a wired network. When the Brother wireless device is set
in this mode, it receives all print jobs via an access point.
Figure B-1
Ad-hoc Mode
Ad-hoc networks (also sometimes referred to as peer-to-peer
networks) do not have a central Access point. Each Wireless client
communicates directly with each other. When the Brother wireless
device is set in this mode, it receives all print jobs directly from the
computer sending the print data.
Figure B-2