21. What is PCI (Peripheral Component Interconnect)?A type of system busA modem standardA type of monitorA kind of graphics

Understanding PCI (Peripheral Component Interconnect)

Peripheral Component Interconnect (PCI) is a standard for connecting peripheral devices to a computer's motherboard. Here’s a breakdown of the options given:

1. A type of system bus: This is the correct definition of PCI. It is a parallel interface standard that allows multiple peripheral devices to be connected to the computer’s board.

2. A modem standard: This is incorrect. PCI does not specifically relate to modems or their standards.

3. A type of monitor: This is also incorrect. PCI does not describe any type of display or monitor.

4. A kind of graphics: While graphics cards can connect via a PCI interface, saying PCI is a kind of graphics is misleading.

Final Answer

PCI is A type of system bus used for connecting peripheral devices to the motherboard.