Using proximity, you can create a connection between two devices with a simple tap gesture or by browsing for devices within wireless range. You do not need to be connected to a network. You can simply tap two computers together, or connect using Wi-Fi Direct.
For a tap gesture, if two devices with proximity come within 3-4 centimeters of each other, proximity notifies both devices. You can use proximity to enable a quick exchange of data during a tap gesture, or you can use the tap to set up a long-term communication channel using TCP/IP, Wi-Fi Direct, or Bluetooth.