The procedural characteristics or protocol define the sequence of operations performed by pins in the connector. Functional characteristics specify the operations performed by each pin in a connector these can be classified into the broad categories of data, control, timing, and electrical ground. The Centronics connector is a 36-pin parallel interface that also defines electrical signaling. Common mechanical interface standards associated with parallel transmission are the DB-25 and Centronics connectors. Mechanical characteristics define the actual connector shape and number of wires. The electrical characteristics define voltage levels and timing of voltage level changes. Each of these standards has different electrical, mechanical, functional, and procedural characteristics. To resolve the speed and distance limitations of serial transmission via RS-232, several other serial transmission standards have been developed including RS-449, V.35, Universal Serial Bus (USB), and IEEE-1394 (Firewire). Conversely, Parallel Transmission is unreliable and complicated. Serial Transmission is simple and reliable.Serial transmission cables are thinner, longer and economical in comparison with the Parallel Transmission cables.The special types of converters are required in a serial transmission system to convert the data between the internal parallel form and serial form while there is no such requirement of converters in parallel transmission systems.In contrast, Parallel Transmission is half-duplex since the data is either sent or received. Serial Transmission is full-duplex as the sender can send as well as receive the data.The advantage of serial over parallel transmission is that with only one. Data within a computer system is transmitted via parallel mode on buses with the width of. Less important than the economical advantage of serial transmission. On the contrary, in Serial transmission data flows through a single wire. Typically, it used eight channels for transmission, allowing eight bits (one byte) to be sent simultaneously. It is too slow for modern transmission need. Parallel transmission is faster as the data is transmitted using multiples lines. Answer (1 of 2): Serial transmission is an ancient way of transmission technology, one bit at a time.Since one bit follows another in Serial Transmission whereas, in Parallel Transmission multiple bits are sent together. Error and noise are least in serial as compared to parallel transmission.As against, parallel transmission is used for the shorter distance. Serial transmission is used for long-distance communication.Serial transmission requires a single line to communicate and transfer data whereas, parallel transmission requires multiple lines.Key Differences Between Serial And Parallel Transmission Despite the speed of the data, the parallel transmission has a limitation called skew where bits could travel in quite different speeds over the wires.
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