Question - Explain Full duplex and half duplex.
Answer -
Full duplex refers to the transmission of data in two directions simultaneously. For example, a telephone is a fullduplex device because both parties can talk at once. In contrast, a walkietalkie is ahalfduplex device because only one party can transmit at a time. Most modems have a switch that lets you choose between fullduplex and halfduplex modes. The choice depends on which communications program you are running. In fullduplex mode, data you transmit does not appear on your screen until it has been received and sent back by the other party. This enables you to validate that the data has been accurately transmitted. If your display screen shows two of each character, it probably means that your modem is set to halfduplex mode when it should be in fullduplex mode.