Which motherboard chip is responsible for managing data communication between the CPU and peripheral devices?

• A. Northbridge
• B. Input/Output Controller Hub
• C. Southbridge
• D. BIOS

Answer: (B)

The thing being tested is which chipset piece acts as the bridge between the CPU and the devices outside the processor. The component that handles data communication with peripheral devices lives in the I/O area of the chipset. This I/O Controller Hub coordinates data flow to and from USB ports, storage interfaces, network adapters, and other slower, peripheral interfaces, effectively managing how the CPU talks to those devices.

Historically, the Northbridge handles memory and high-speed components, while the Southbridge deals with older, slower I/O. The I/O Controller Hub is the part specifically responsible for directing the pathways to peripherals, making it the best answer. BIOS, by contrast, is firmware that initializes hardware at boot, not the controller that routes ongoing data traffic.