Data transferring modes in computer networks are of three types. They are listed below,
Simplex: Data transferring which takes place only in one direction is called Simplex. In Simplex mode, the data gets transferred either from sender to receiver or from receiver to sender. For Example, Radio signal, the print signal given from computer to printer, etc.
Half Duplex: Data transferring can happen in both directions but not at the same time. Alternatively, the data is sent and received. For Example, Browsing through the internet, a user sends the request to the server and later the server processes the request and sends back the web page.
Full Duplex: Data transferring happens in both directions that too simultaneously. For Example, Two-lane roads where traffic flows in both directions, communication through telephone, etc.