LAN Switching first-step

Data Transmission Modes

Network devices use three transmission modes (methods) to exchange data, or “talk” to each other, as follows: simplex, half duplex, and full duplex.

• Simplex transmission is like a one-way street where traffic moves in only one direction. Simplex mode is a one-way-only transmission, which means that data can flow only in one direction from the sending device to the receiving device. Figure 1-7 illustrates simplex transmission.

  Figure 1-7. Simplex (One-Way Street)

  

• Half-duplex transmission is like the center lane on some three-lane roads. It is a single lane in which traffic can move in one direction or the other, but not in ...