![]() ![]() Parallel transmission refers to the transmission of x bits across a channel at a time, where x is the number of wires in the channel. Figure 1 illustrates serial transmission.Īmong other applications, serial ports are often used to allow a technician to interface with the operating system of a device by typing commands in a terminal window that is spawned by software that communicates with the device through the serial connection. Serial transmission refers to the transmission of data down a single wire one bit at a time. I/O ports send and receive data in the form of bits (0s and 1s), which can be transmitted in serial or parallel. I/O ports transmit data via serial or parallel connections that can be manipulated from within the BIOS. External devices connect to a computer using Input/ Output ( I/O) ports. Internally they connect to the PCI slots, PCI express slots, IDE interface, SATA interface, or some other bus system. Identify the appropriate connector or cable for various hardware components.Īll devices connect to the motherboard in some way.Identify connector types and associated cables.Identify the characteristics of connection interfaces. ![]()
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