Frequency Division Multiple Access or FDMA is a channel

access method used in multiple-access protocols as a

channelization protocol. FDMA gives users an individual

allocation of one or several frequency bands, or channels.

Multiple Access systems coordinate access between multiple

users. The users may also share access via different methods

such as TDMA, CDMA, or SDMA. These protocols are utilized

differently, at different levels of the theoretical OSI model.

Disadvantage: Crosstalk which causes interference on the

other frequency and may disrupt the transmission.