Both use serial transmission; however, the serial port connects the computer to one device, whereas a serial bus allows for the connection of multiple devices. See bus and PCI. THIS DEFINITION IS ...
For example, bus adapters enable communication between video cards and computer processors that do not share the same protocol. Some bus adapters are housed in cables that connect one bus to another.
Bus extenders use many different bus protocols. Examples include IDE and EIDE, GPIB or HPIB, IEEE 1394 or FireWire ® (Apple Computer, Inc.), InfiniBand (IB) ISA and EISA, PCI, PCI-X, and Compact PCI ...