In synchronous transmission, data is sent in a continuous stream, synchronized by a clock signal. This means that the sender and receiver are synchronized to the same clock and can interpret the data without needing special headers to mark the start and end of each data unit. The system relies on the timing of the clock to determine when data begins and ends, so headers are generally not required.
In contrast, asynchronous transmission typically requires headers (such as start and stop bits) because the data is sent without a continuous clock signal.
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