Two devices can communicate in simplex, half-duplex or full-duplex mode.
Simplex:
In simplex mode, the communication is unidirectional. Only one of the devices on a link can transmit;
the other can only receive.
Ex. Keyboard and monitor
Half-duplex
In half-duplex mode, each station can both transmit and receive but not at the same time. When one
device is sending, the other can only receive.
Ex. Walkie-talkies and CB (citizen band radios)
Full-duplex
In full-duplex mode, both stations can transmit and receive simultaneously.
Ex. Telephone network
When two people are communicating by a telephone line, both can listen and talk at the same time.
0 Comment to "Direction of data flow "
Post a Comment
Note: Only a member of this blog may post a comment.