An asynchronous line that is idle is identified with a value of:
Correct answer: B. 1
- A. 0
- B. 1
Explanation
In asynchronous transmission, a constant value, typically a high voltage level (logic 1), is used to represent an idle line. This is because asynchronous transmission uses start and stop bits to signal the beginning and end of each data character. The constant idle value (mark) is interrupted by a transition to a different voltage level (space) to indicate the start bit.
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