The beginning and the end of each transfer during asynchronous communication data transfer are
marked by?

A.
Start and Stop bits.

B.
Start and End bits.

C.
Begin and Stop bits.

D.
Start and Finish bits.

Explanation:
The ASYNCHRONOUS (ASYNC) format for data transmission is a procedure or
protocol in which each information CHARACTER or BYTE is individually synchronized or
FRAMED by the use of Start and Stop Elements, also referred to as START BITS and STOP
BITS. The Asynchronous Transmission Format is also known as START-STOP mode or
CHARACTER mode. Each character or byte is framed as a separate and independent unit of
DATA that may be transmitted and received at irregular and independent time intervals. The
characters or bytes may also be transmitted as a contiguous stream or series of characters.