The built-in wifi module supports the following modes:

Mode Description
AP Access Point - Creates a wifi network to which other devices can connect
STA
Client Mode - Connects to an existing wifi network
Ad-Hoc Ad-Hoc or Peer-to-Peer Mode - No centralized access point, devices on the
network directly connect to each other
Bridge
Bridge Mode - Also known as Static Wireless Distribution System Mode -
Allows the wifi module to serve as an Access Point while also being connected to 
an existing wifi network (which provides the internet access)
Monitor Monitor all wifi traffic and packets