In half duplex communication, how many devices can communicate at a time?

In half duplex communication, only one device can transmit data at a time while the others must wait for their turn. This is akin to a one-lane road where traffic can flow in both directions, but only one direction can move at any given moment. Devices take turns sending and receiving messages, enabling effective communication but limiting simultaneous interaction. This allows for clear and orderly transmissions, although it also means that overall communication can be slower compared to full duplex, where both devices can send and receive messages at the same time without needing to wait.

In summary, half duplex communication allows only one device to communicate at a time, thereby ensuring that collisions do not occur during data transmission.