+Half Duplex is a communication mode allowing data to travel in both directions, but only one way at any given moment. Like a [Two-way Radio](/wiki/Two-way_Radio), one device must complete its transmission before the other can begin receiving or sending. This method contrasts with [Full Duplex](/wiki/Full_Duplex), which permits simultaneous two-way communication.
+## See also
+- [Full Duplex](/wiki/Full_Duplex)
+- [Simplex](/wiki/Simplex)
+- [Data Transmission](/wiki/Data_Transmission)
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