Question

In serial communication, an extra clock is needed.

• A. To synchronize the devices
• B. For programmed band rate control
• C. To make efficient use of RS-$232$
• D. None of the above

Answer 1

The correct option is B For programmed band rate control

In serial communication, an extra clock is needed for programmed band rate control.

Synchronous communication requires that the clocks in the transmitting and receiving devices are synchronized running at the same rate, so the receiver can sample the signal at the same time intervals used by the transmitter.

In telecommunication and data transmission, serial communication is the process of sending data one bit at a time, sequentially, over a communication channel or computer bus.