# Hot Swap in a multiple-host configuration

From the point of view of the client application, Hot Swap operates the same regardless of whether or not the application is located on the same resource host as the board being extracted or inserted. The application receives Hot Swap events if it is registered to receive the NMS OAM alert notification messages, as described in Receiving NMS OAM alert notifications. When a board is being extracted, the application closes all contexts associated with the board and discontinues using the board, as described in Closing resources. When the board is inserted, it is ready for use when the application receives HSWEVN_BOARD_READY.