Which of the following best describes the function of the data bus?

Which of the following best describes the function of the data bus?

• A. Supply power to components
• B. Transmit data between CPU and peripherals
• C. Store data permanently
• D. Manage airflow in the system

Answer: (B)

The data bus serves a crucial role in a computer system by facilitating communication between different components, especially between the central processing unit (CPU) and various peripherals. Its primary function is to transmit data, which means it carries the binary information back and forth among the CPU, memory, and input/output devices. This transmission of data is essential for the CPU to execute instructions and process information from various sources like storage devices (hard drives, SSDs) and user inputs (keyboard, mouse). The data bus works in conjunction with the address bus and control bus, which manage where the data is sent and coordinate the communication process. Therefore, it is this role of transmitting data that makes the answer correct, as it captures the essence of what a data bus does in a computer architecture. Other choices such as supplying power, permanent data storage, or managing airflow pertain to different components and functions within a computer system, thereby not aligning with the specific purpose of a data bus.

The data bus serves a crucial role in a computer system by facilitating communication between different components, especially between the central processing unit (CPU) and various peripherals. Its primary function is to transmit data, which means it carries the binary information back and forth among the CPU, memory, and input/output devices.

This transmission of data is essential for the CPU to execute instructions and process information from various sources like storage devices (hard drives, SSDs) and user inputs (keyboard, mouse). The data bus works in conjunction with the address bus and control bus, which manage where the data is sent and coordinate the communication process. Therefore, it is this role of transmitting data that makes the answer correct, as it captures the essence of what a data bus does in a computer architecture.

Other choices such as supplying power, permanent data storage, or managing airflow pertain to different components and functions within a computer system, thereby not aligning with the specific purpose of a data bus.