In which duplex mode can an interface send and receive data at the same time?

In full duplex mode, an interface can send and receive data simultaneously. This is akin to a two-way street where vehicles can go in both directions at the same time without interference. In networking, this allows devices to communicate more efficiently and effectively, as they can transmit and receive packets without waiting for the other to finish.

In contrast, half duplex mode allows for one direction of communication at a time, where data can either be sent or received, but not both simultaneously. Simplex mode restricts communication to one direction only, which means that data can only be sent, not received. Multicast refers to a method of sending data to multiple destinations, but it does not pertain specifically to the duplex capabilities of an interface. Hence, full duplex is the accurate choice when identifying the mode that supports simultaneous transmission and reception of data.