Simplex, Half-Duplex, and Full Duplex

When data travels across the medium, it travels in a certain direction. To describe the movement of data across communication channels, certain terms are used, including:

• Simplex, which refers to data moving in a single direction.

• Half-duplex, which means data travels both ways on the medium, but in only one direction at a time.

• Full duplex, which means data travels in both directions simultaneously.