Exam-style question
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Which comparison between synchronous and asynchronous transmission is correct?.
- A.Synchronous transmission uses agreed timing, while asynchronous transmission uses start and stop bits to identify each unit of data.
- B.Synchronous transmission always uses start and stop bits, while asynchronous transmission always uses a shared clock.
- C.Both methods require every bit to use a separate communication line.
- D.Neither method provides the receiver with any way to identify data boundaries.
Model answer
What a good answer should say
- Synchronous transmission uses agreed timing, while asynchronous transmission uses start and stop bits to identify each unit of data.
Explanation
Why this works
Synchronous transmission coordinates transmission through timing. Asynchronous transmission does not rely on a continuous shared timing signal in the same way; start and stop bits mark the boundaries of each transmitted unit.
Common mistake
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