What type of communication allows data to be transmitted in both directions at the same time?

Full duplex communication is a mode of transmission that allows data to be sent and received simultaneously between two devices. This means that both parties can communicate in real-time without any wait times or interruptions. This capability is crucial in various applications, such as telephony, where both individuals can speak and hear each other at the same time, leading to a natural conversation flow.

In contrast, simplex communication allows data to flow in only one direction, similar to a broadcast where the sender transmits, but the receiver cannot respond. Half duplex communication, on the other hand, permits data to be transmitted in both directions, but only one direction at a time, which introduces delays as one party must finish transmitting before the other can begin. Sequential communication is not a standard term used in this context. Thus, full duplex is the appropriate choice for the type of communication noted for simultaneous bi-directional data transmission.