What does PCI stand for?

• A. Peripheral Component Interconnect
• B. Personal Computer Interface
• C. Post Office Protocol
• D. Peripheral Input Controller

Answer: (A)

PCI stands for Peripheral Component Interconnect. It’s the standard bus used to attach expansion cards to the motherboard, letting devices like network cards, sound cards, and graphics adapters communicate with the CPU and memory through a common interface. PCI defined how devices address memory, transfer data, and gain control of the bus (bus mastering), enabling plug-and-play and a unified way to add hardware. Over time it evolved into PCI-X and, more recently, PCIe, which move to faster speeds and different signaling. The other options aren’t related to this hardware connection: Post Office Protocol is for email retrieval, Personal Computer Interface isn’t a recognized term for this purpose, and Peripheral Input Controller isn’t the name of the motherboard’s expansion bus.