What is the method of data transmission where bits of each character are sent one at a time over a single channel?

The method of data transmission where bits of each character are sent one at a time over a single channel is serial transmission. In this technique, data bits are transmitted sequentially, meaning one bit follows the other, down a single communication line or channel. This method is commonly used in various communication systems, including USB and RS-232 interfaces.

Serial transmission is advantageous for long-distance communication because it reduces the number of wires required and minimizes the risk of interference. Although it may be slower than parallel transmission, which sends multiple bits simultaneously over multiple channels, the simplicity and reduced physical requirements of serial connections make them widely used in networking and data transfer applications.

Understanding this concept is essential for identifying how data is efficiently transmitted in different environments, ensuring that communication protocols are effectively implemented in software design and development.